Year	current US$
1970	5032444.65000917
1971	4746449.79483393
1972	5672516.91584579
1973	9279190.93408594
1974	10984531.4311169
1975	14771258.7309724
1976	14321292.5374028
1977	25373629.1654762
1978	27208063.3639596
1979	27976181.5994472
1980	35891033.8903754
1981	31157380.6474647
1982	42887223.1795651
1983	29608844.0281131
1984	26883252.641795
1985	20713519.370203
1986	31297989.2498564
1987	30808006.1360343
1988	34316189.7888102
1989	35311385.8090032
1990	44126891.6438929
1991	44489543.7817162
1992	44777076.6398362
1993	37835378.1716433
1994	44789851.6938379
1995	66188198.7543202
1996	65362783.5040811
1997	61428500.2241823
1998	65240248.8798322
1999	43248182.7771284
2000	44000095.2376968
2001	43294419.8534211
2002	52551163.5198778
2003	85115432.7073922
2004	75186605.5665287
2005	78640578.7108522
2006	79162157.8223054
2007	116547435.445308
2008	138736755.941026
2009	142760568.153654
2010	126893077.518857
2011	145712504.947724
2012	169361817.351405
2013	177206406.309751
2014	197256396.740283
2015	208298088.12996
2016	220491663.446754
2017	215835714.200622
2018	148790886.429984
2019	143206605.110277
2020	159663752.277146
2021	170872862.739302