| Year | Oil | Water |
|---|---|---|
| 1990 | 26,955,703 | 277,335,634 |
| 1991 | 26,444,497 | 286,051,612 |
| 1992 | 24,880,314 | 262,581,806 |
| 1993 | 22,374,046 | 242,951,473 |
| 1994 | 19,978,851 | 227,161,540 |
| 1995 | 19,799,253 | 233,233,549 |
| 1996 | 19,532,991 | 235,154,605 |
| 1997 | 20,975,451 | 247,194,704 |
| 1998 | 20,670,785 | 230,196,193 |
| 1999 | 17,975,702 | 228,642,503 |
| 2000 | 20,309,474 | 270,306,892 |
| 2001 | 20,310,127 | 289,220,876 |
| 2002 | 18,697,786 | 286,630,147 |
| 2003 | 17,226,841 | 293,478,318 |
| 2004 | 17,166,461 | 302,195,474 |
| 2005 | 17,897,565 | 287,694,796 |
| 2006 | 17,779,039 | 324,523,616 |
| 2007 | 20,421,252 | 342,432,178 |
| 2008 | 22,336,517 | 329,764,384 |
| 2009 | 23,327,628 | 316,154,531 |
| 2010 | 24,009,960 | 304,849,895 |
| 2011 | 24,046,752 | 278,557,599 |
| 2012 | 24,137,380 | 261,629,832 |
| 2013 | 24,027,872 | 249,017,478 |
| 2014 | 24,372,677 | 245,919,070 |
| 2015 | 24,915,733 | 209,290,758 |
| 2016 | 20,375,808 | 181,868,297 |
| 2017 | 17,779,671 | 173,169,033 |