Year	current US$
1981	1616049966.6666667
1982	1792535033.3333333
1983	1581098900
1984	1213075575
1985	1372950325
1986	1849287166.6666667
1987	1535420400
1988	1499777433.3333333
1989	1709829333.3333333
1990	744351900
1991	736647778.9473684
1992	338031607.98122066
1993	161871161.99797502
1994	176521820.1201783
1995	388962335.88194644
1996	352592345.9572613
1997	295643171.179382
1998	342566604.02046657
1999	335072932.31611127
2000	329821984.0041996
2001	319205163.262192
2002	344135176.9203937
2003	514687410.6441991
2004	621189320.8355832
2005	947022532.6082566
2006	1225140291.0416737
2007	1639162504.9364607
2008	2449818503.3507433
2009	1575512730.8135026
2010	3025834002.438884
2011	6053372625.010848
2012	6871489046.686015
2013	6703214949.530079
2014	4300712925.905751
2015	2848482867.765087
2016	2530273675.6904645
2017	3146470327.230507
2018	5189260586.6601
2019	5056305303.950827
2020	2979924200.2735205
2021	5613033062.289479
2022	7258461558.9313965
2023	6435967422.481534