Year	current US$
1970	10996309.1740465
1971	14887170.8940709
1972	20714130.0847957
1973	33257501.1292961
1974	47792486.0492454
1975	54832161.412994
1976	54440297.0849525
1977	61479688.8233705
1978	74998025.7753759
1979	98342199.7913192
1980	126407483.625628
1981	126889371.115073
1982	123978429.86588
1983	138438068.220275
1984	135115910.126166
1985	117421982.892465
1986	150892789.432006
1987	215355094.611842
1988	287269188.16657
1989	317124525.113101
1990	434029031.559689
1991	489784576.707171
1992	547984324.075631
1993	568230046.15752
1994	572120727.86636
1995	663852684.621688
1996	659932476.067649
1997	627534631.622611
1998	577336246.579832
1999	610947626.259499
2000	628383994.617389
2001	556792597.42974
2002	618650109.174193
2003	1444174813.73341
2004	1714034855.17279
2005	1666904054.19017
2006	1654891200.22688
2007	1792696624.64242
2008	1983562449.46595
2009	2108294373.75501
2010	2480430261.16233
2011	2757447883.97211
2012	2576964019.7428
2013	2744975822.39082
2014	2952628680.66802
2015	2546786022.17735
2016	3050293335.09061
2017	3152713589.7193
2018	3395102058.15193
2019	3422129222.27894
2020	2977034156.39461
2021	3414259635.51718