Year	current US$
1970	100891.25106383
1971	93239.0425531915
1972	120990.060118655
1973	169535.219512195
1974	204744.375
1975	268980.328571429
1976	237065.4
1977	434797.628571429
1978	590636.2
1979	548631.6
1980	728210.45
1981	786604.225
1982	1986136.53333333
1983	1420367.14285714
1984	1555191.1047619
1985	596153.712
1986	1894418.63809524
1987	2061871.11428571
1988	2227371.45714286
1989	2409211.40952381
1990	2570211.7047619
1991	2697138.4
1992	2372901.09123805
1993	1775139.44297921
1994	2058385.30734633
1995	3147998.8137931
1996	3280226.4
1997	3402656.55172414
1998	4871908.8
1999	2096542.0081337
2000	2106138.84290024
2001	2381111.10769231
2002	2685335.74903846
2003	3875706.31840699
2004	3817623.59942168
2005	3823132.66745915
2006	4739227.37675058
2007	4437245.53630374
2008	7897318.47168556
2009	7797117.28197003
2010	9459528.72165056
2011	11009346.4946457
2012	12804111.4482893
2013	10760071.3710927
2014	17473783.4733082
2015	16064465.2060825
2016	12619039.1997172
2017	15785334.7349889
2018	8127386.3705066
2019	11074516.8098088
2020	10247781.1466303
2021	9651723.40526256