| Year | Total number of spills | Approximate total volume in barrels |
| 2007 | 320 | 26,000 |
| 2008 | 210 | 100,000 |
| 2009 | 190 | 120,000 |
| 2010 | 170 | 23,000 |
| 2011 | 207 | 18,000 |
| 2012 | 192 | 22,000 |
| 2013 | 200 | 20,000 |
| 2014 | 204 | 22,000 |
| Total | 1693 | 351,000 |