Year	current US$
1981	421417874.3961353
1982	420917874.3961353
1983	460765700.48309183
1984	519096618.357488
1985	478019323.67149764
1986	536280193.236715
1987	572898550.7246377
1988	630434782.6086957
1989	632367149.7584542
1990	596473429.9516909
1991	590338164.2512078
1992	340624442.4620874
1993	343678629.1172133
1994	368526619.7499698
1995	433599756.9244547
1996	493776015.70042574
1997	549658892.0659186
1998	510328454.57952225
1999	497566510.0054587
2000	533735175.4547233
2001	595307284.0366004
2002	559307947.1361513
2003	609288503.0009906
2004	867335692.3255409
2005	978662906.2832308
2006	1117165270.8820515
2007	1385717534.682738
2008	1815772392.903505
2009	1836932527.1139264
2010	2204018307.3462105
2011	2446091811.414392
2012	3296551724.1379313
2013	3881352136.0545335
2014	4513609293.7426605
2015	5231426756.95906
2016	5624029416.658801
2017	5744505162.33974
2018	5269731667.545508
2019	5439456915.445266
2020	6104284301.528057
2021	5689095419.236994
2022	5298620744.353471
2023	5993343423.741183