Year Oil Reserves
1981 230341
1982 293827
1983 379089
1984 450505
1985 493316
1986 511565
1987 540648
1988 559515
1989 579857
1990 585692
1991 568508
1992 574724
1993 587080
1994 591670
1995 591640
1996 565816
1997 563429
1998 571405
1999 567241
2000 540678