| Incident
Type |
1991 |
1992 |
1993 |
1994 |
1995 |
1996 |
1997 |
1998 |
1999 |
| Fixed |
11,404 |
12,536 |
13,556 |
14,656 |
15,080 |
12,067 |
10,388 |
10,961 |
11,230 |
| Unknown
Sheen |
3,794 |
3,784 |
4,416 |
5,087 |
5,147 |
4,433 |
4,228 |
4,809 |
4,802 |
| Vessel |
2,914 |
2,690 |
2,886 |
3,598 |
3,967 |
4,091 |
3,778 |
3,886 |
3,877 |
| Mobile |
1,832 |
1,850 |
2,782 |
3,456 |
3,133 |
2,511 |
2,490 |
2,718 |
2,835 |
| Pipeline |
1,794 |
2,030 |
1,918 |
1,945 |
1,530 |
1,737 |
1,740 |
1,657 |
1,404 |
| Platform |
2,331 |
2,166 |
1,617 |
1,671 |
1,770 |
2,106 |
1,943 |
1,570 |
1,465 |
| Storage
Tank |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| Railroad
Non-Release |
248 |
441 |
502 |
493 |
455 |
446 |
586 |
823 |
1,049 |
| Railroad |
966 |
1,162 |
1,425 |
1,530 |
1,578 |
1,645 |
1,883 |
2,266 |
2,252 |
| Continuous |
333 |
323 |
476 |
215 |
183 |
177 |
170 |
304 |
376 |
| Aircraft |
138 |
203 |
264 |
265 |
225 |
173 |
207 |
181 |
241 |
| Drill/Exercise |
0 |
0 |
88 |
188 |
228 |
349 |
349 |
503 |
532 |
| Unknown |
0 |
0 |
6 |
21 |
8 |
46 |
14 |
3 |
52 |
| Terrorist
Non-Release |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
18 |
51 |
| TOTAL
INCIDENTS |
25,754 |
27,185 |
29,936 |
33,125 |
33,304 |
29,781 |
27,776 |
29,699 |
30,166 |
|