Year	current US$
1975	-9585678.75376358
1976	-8919222.778931933
1977	-7958305.611000221
1978	-16245850.978596771
1979	-19530628.213726807
1980	-20055795.946253702
1981	-26060675.706734084
1982	-22988132.670656253
1983	-30744144.14414414
1984	-23352347.520842474
1985	-25285983.65807668
1986	-30117647.05882353
1987	-27504551.183307663
1988	-46942664.27411775
1989	-40094557.01231625
1990	-35460719.246797346
1991	-49780965.602344595
1992	-34742038.45297305
1993	-38299855.49132948
1994	-56033176.79139524
1995	-77702415.61098434
1996	-83497037.09716699
1997	-64776414.721013054
1998	-74908310.9919571
1999	-39160649.17513665
2000	-49738852.02265378
2001	-58204564.997800425
2002	-67626467.28382006
2003	-75431290.49184151
2004	-85455855.51763867
2005	-102164059.9405135
2006	-109177912.40025684
2007	-137323248.110269
2008	-126578108.9208715
2009	-158979200.2485499
2010	-176757091.06706735
2011	-191964060.0701834
2012	-206633068.46528354
2013	-190312687.9931802
2014	-180263807.6924138
2015	-207710921.74725723
2016	-174925086.41273835
2017	-200969182.40615457
2018	-218887091.89236498
2019	-221318727.17237154
2020	-215025277.6122039
2021	-226741120.71784943