1. Chart data
  2. Oil spills from tankers have fallen by more than 90% since t
Our World in DataStacked bar chart · 111 points · Our World in Data

Oil spills from tankers have fallen by more than 90% since the 1970s

The numbers behind a chart Our World in Data published, redrawn natively. Check the original, study the data, then make your own.

Estimated from the image 38%All chart data
Chart by Our World in Data. Source: x.com

Simplified redraw

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A simplified redraw: it shows the numbers in our own look, not the look of the original. One accent marks what the chart is about. Values marked with ~ in the table are estimates.

The numbers

First 10 of 111 points are free
GroupSeriesValue (spills)SourceConf.
1970Medium oil spills (7-700 tonnes)~6Estimate0.80
1970Large oil spills (>700 tonnes)~30Estimate0.80
1971Medium oil spills (7-700 tonnes)~18Estimate0.80
1971Large oil spills (>700 tonnes)~12Estimate0.30
1972Medium oil spills (7-700 tonnes)~28Estimate0.80
1972Large oil spills (>700 tonnes)~32Estimate0.80
1973Medium oil spills (7-700 tonnes)~48Estimate0.30
1973Large oil spills (>700 tonnes)~40Estimate0.30
1974Medium oil spills (7-700 tonnes)~90Estimate0.80
1974Large oil spills (>700 tonnes)~27Estimate0.80

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1975Medium oil spills (7-700 tonnes)~62Estimate0.30
1975Large oil spills (>700 tonnes)~24Estimate0.30
1976Medium oil spills (7-700 tonnes)~58Estimate0.30
1976Large oil spills (>700 tonnes)~26Estimate0.30
1977Medium oil spills (7-700 tonnes)~50Estimate0.30
1977Large oil spills (>700 tonnes)~30Estimate0.30
1978Medium oil spills (7-700 tonnes)~48Estimate0.30
1978Large oil spills (>700 tonnes)~25Estimate0.30
1979Medium oil spills (7-700 tonnes)~44Estimate0.30
1979Large oil spills (>700 tonnes)~20Estimate0.80
1980Medium oil spills (7-700 tonnes)~40Estimate0.30
1980Large oil spills (>700 tonnes)~20Estimate0.30
1981Medium oil spills (7-700 tonnes)~30Estimate0.30
1981Large oil spills (>700 tonnes)~14Estimate0.30
1982Medium oil spills (7-700 tonnes)~24Estimate0.30
1982Large oil spills (>700 tonnes)~10Estimate0.30
1983Medium oil spills (7-700 tonnes)~30Estimate0.30
1983Large oil spills (>700 tonnes)~14Estimate0.30
1984Medium oil spills (7-700 tonnes)~22Estimate0.30
1984Large oil spills (>700 tonnes)~8Estimate0.30
1985Medium oil spills (7-700 tonnes)~20Estimate0.30
1985Large oil spills (>700 tonnes)~8Estimate0.30
1986Medium oil spills (7-700 tonnes)~14Estimate0.30
1986Large oil spills (>700 tonnes)~6Estimate0.30
1987Medium oil spills (7-700 tonnes)~20Estimate0.80
1987Large oil spills (>700 tonnes)~8Estimate0.30
1988Medium oil spills (7-700 tonnes)~20Estimate0.30
1988Large oil spills (>700 tonnes)~6Estimate0.30
1989Medium oil spills (7-700 tonnes)~30Estimate0.80
1989Large oil spills (>700 tonnes)~24Estimate0.30
1990Medium oil spills (7-700 tonnes)~20Estimate0.30
1990Large oil spills (>700 tonnes)~10Estimate0.30
1991Medium oil spills (7-700 tonnes)~20Estimate0.80
1991Large oil spills (>700 tonnes)~10Estimate0.30
1992Medium oil spills (7-700 tonnes)~20Estimate0.30
1992Large oil spills (>700 tonnes)~10Estimate0.30
1993Medium oil spills (7-700 tonnes)~20Estimate0.80
1993Large oil spills (>700 tonnes)~10Estimate0.80
1994Medium oil spills (7-700 tonnes)~20Estimate0.30
1994Large oil spills (>700 tonnes)~10Estimate0.80
1995Medium oil spills (7-700 tonnes)~20Estimate0.30
1995Large oil spills (>700 tonnes)~8Estimate0.80
1996Medium oil spills (7-700 tonnes)~20Estimate0.30
1996Large oil spills (>700 tonnes)~8Estimate0.30
1997Medium oil spills (7-700 tonnes)~20Estimate0.30
1997Large oil spills (>700 tonnes)~8Estimate0.30
1998Medium oil spills (7-700 tonnes)~20Estimate0.30
1998Large oil spills (>700 tonnes)~8Estimate0.30
1991999Medium oil spills (7-700 tonnes)~20Estimate0.30
1999Large oil spills (>700 tonnes)~8Estimate0.30
2000Medium oil spills (7-700 tonnes)~20Estimate0.30
2000Large oil spills (>700 tonnes)~8Estimate0.30
2001Medium oil spills (7-700 tonnes)~20Estimate0.30
2001Large oil spills (>700 tonnes)~8Estimate0.30
2002Medium oil spills (7-700 tonnes)~20Estimate0.30
2002Large oil spills (>700 tonnes)~8Estimate0.30
2003Medium oil spills (7-700 tonnes)~20Estimate0.30
2003Large oil spills (>700 tonnes)~8Estimate0.30
2004Medium oil spills (7-700 tonnes)~20Estimate0.30
2004Large oil spills (>700 tonnes)~8Estimate0.30
2005Medium oil spills (7-700 tonnes)~20Estimate0.30
2005Large oil spills (>700 tonnes)~8Estimate0.30
2006Medium oil spills (7-700 tonnes)~20Estimate0.30
2006Large oil spills (>700 tonnes)~8Estimate0.30
2007Medium oil spills (7-700 tonnes)~20Estimate0.30
2007Large oil spills (>700 tonnes)~8Estimate0.30
2008Medium oil spills (7-700 tonnes)~20Estimate0.30
2008Large oil spills (>700 tonnes)~8Estimate0.30
2009Medium oil spills (7-700 tonnes)~20Estimate0.30
2009Large oil spills (>700 tonnes)~8Estimate0.30
2010Medium oil spills (7-700 tonnes)~20Estimate0.30
2010Large oil spills (>700 tonnes)~8Estimate0.30
2011Medium oil spills (7-700 tonnes)~20Estimate0.30
2011Large oil spills (>700 tonnes)~8Estimate0.30
2012Medium oil spills (7-700 tonnes)~20Estimate0.30
2012Large oil spills (>700 tonnes)~8Estimate0.30
2013Medium oil spills (7-700 tonnes)~20Estimate0.30
2013Large oil spills (>700 tonnes)~8Estimate0.30
2014Medium oil spills (7-700 tonnes)~20Estimate0.30
2014Large oil spills (>700 tonnes)~8Estimate0.30
2015Medium oil spills (7-700 tonnes)~20Estimate0.30
2015Large oil spills (>700 tonnes)~8Estimate0.30
2016Medium oil spills (7-700 tonnes)~20Estimate0.30
2016Large oil spills (>700 tonnes)~8Estimate0.30
2017Medium oil spills (7-700 tonnes)~20Estimate0.30
2017Large oil spills (>700 tonnes)~8Estimate0.30
2018Medium oil spills (7-700 tonnes)~20Estimate0.30
2018Large oil spills (>700 tonnes)~8Estimate0.30
2019Medium oil spills (7-700 tonnes)~20Estimate0.30
2019Large oil spills (>700 tonnes)~8Estimate0.30
2020Medium oil spills (7-700 tonnes)~20Estimate0.30
2020Large oil spills (>700 tonnes)~8Estimate0.30
2021Medium oil spills (7-700 tonnes)~20Estimate0.30
2021Large oil spills (>700 tonnes)~8Estimate0.30
2022Medium oil spills (7-700 tonnes)~20Estimate0.30
2022Large oil spills (>700 tonnes)~8Estimate0.30
2023Medium oil spills (7-700 tonnes)~20Estimate0.30
2023Large oil spills (>700 tonnes)~8Estimate0.30
2024Medium oil spills (7-700 tonnes)~5Estimate0.80
2024Large oil spills (>700 tonnes)~5Estimate0.80
1999Medium oil spills (7-700 tonnes)~10Estimate0.30
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Approximate values. Our two readings of this chart agreed only in part (confidence 0.38 of 1), so check the original before you quote a number. The API marks it lowConfidence, and ?min_confidence=0.5 leaves it out.

See the Max planAPI docs
PathReturnsPlan
GET/api/v1/charts/d05391c2f908Title, publisher, date, form, point count; with a Max key, the data linkOpen
GET/api/v1/charts/d05391c2f908/dataEvery point with its provenance and confidence, plus the redraw spec. Add ?format=csv for CSVMax
GET/api/v1/charts/d05391c2f908/render?view=1The draw-only view this page usesOpen
POST/mcpTool get_chart_data with this id, for Claude, Cursor and other agentsMax
curlMax
curl -s https://viral-chart.com/api/v1/charts/d05391c2f908/data \
  -H "Authorization: Bearer $VIRALCHART_KEY"
Claude CodeMax
claude mcp add --transport http viralchart https://viral-chart.com/mcp \
  --header "Authorization: Bearer $VIRALCHART_KEY"

60 requests a minute per key; over that you get 429 with Retry-After. Up to 5 keys per account, made on your account page and shown once. Without Max, the data route answers 402 with a link to the plans. The numbers describe a chart its publisher owns, and every file carries a license note.

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Questions people ask

How accurate are these numbers?

They are estimated from the image by two independent passes, with confidence 0.38 on a 0 to 1 scale. Printed numbers read well; values read off an axis can be a few percent off.

Can I reuse this data?

The numbers describe a chart that Our World in Data published. The image, layout and styling belong to them. Use the numbers with a credit to the publisher, and make your picture from your own data.

How do I get the file?

The JSON, CSV and agent skill file are under the email gate on this page. In this prototype they are static files at /api/charts/d05391c2f908.json and /api/charts/d05391c2f908.skill.md.