Year	current US$
1966	131.40270021199734
1967	142.8369295091542
1968	165.8897162334702
1969	162.47374648399605
1970	167.6972835735018
1971	161.0869072975882
1972	217.38614525979742
1973	384.69471569356676
1974	278.24365046961634
1975	513.040540242786
1976	537.9062978045866
1977	558.5643852767561
1978	589.6126802554809
1979	907.6518366134912
1980	974.7480406248936
1981	868.4839582442092
1982	993.5586815685344
1983	993.0630972160611
1984	939.3598183205368
1985	916.8985994794912
1986	1288.2682579424961
1987	1495.9158521270776
1988	1641.6178877554328
1989	1397.195129602839
1990	1230.0972749035193
1991	1445.712116469723
1992	1487.972500557424
1993	1490.6979010449727
1994	1615.894113992801
1995	1948.3162062674708
1996	1718.0650767009467
1997	1536.9652046069966
1998	1524.8968433938621
1999	1424.1089696581732