Year	current US$
1975	6792973.042
1976	8280723.572
1977	11640783.31
1978	13151628.49
1979	13136022.57
1980	14749095.92
1981	12016345.02
1982	12288872.72
1983	12384394.65
1984	11145952.22
1985	12376421.93
1986	6316862.106
1987	7287922.382
1988	9574397.087
1989	5593505.383
1990	15720900.3100206
1991	58528759.8479116
1992	34072172.0820614
1993	35023238.5663624
1994	41520258.9212842
1995	54089789.4446647
1996	54874346.9800861
1997	88702318.1716049
1998	103769670.406662
1999	110903252.179937
2000	99716150.0779867
2001	96710854.5336319
2002	113506988.619862
2003	149160399.976677
2004	224874522.059524
2005	266225943.930893
2006	436846661.056142
2007	553323272.650584
2008	684992069.414042
2009	686711988.40485
2010	720832415.917746
2011	445209978.457789
2012	774448556.661565
2013	1084976106.53627
2014	1015369008.07143
2015	927659181.488841
2016	882181100.003214
2017	997504149.723498
2018	1011154023.27839
2019	973763234.442629
2020	927119758.113138
2021	986363473.593071
2022	1002956089.13691
2023	1012574319.3915