Year	current US$
1972	19999.9995529652
1976	19999.9995529652
1978	9999.99977648258
1979	9999.99977648258
1980	59999.9986588955
1981	9999.99977648258
1982	59999.9986588955
1983	1879999.99523163
1984	2990000.00953674
1985	3829999.92370605
1986	5289999.96185303
1987	9930000.30517578
1988	6170000.07629395
1989	18450000.762939498
1990	15539999.961853001
1991	17989999.7711182
1992	16090000.152587902
1993	5920000.07629395
1994	6400000.09536743
1995	6099999.90463257
1996	5480000.01907349
1997	6650000.09536743
1998	13039999.961853001
1999	5710000.03814697
2000	5550000.19073486
2001	4679999.82833862
2002	5599999.90463257
2003	5300000.19073486
2004	6239999.771118159
2005	8960000.03814697
2006	8119999.88555908
2007	12310000.4196167
2008	17219999.3133545
2009	19950000.762939498
2010	22430000.3051758
2011	26090000.1525879
2012	23790000.915527303
2013	27209999.084472697
2014	37540000.9155273
2015	26819999.6948242
2016	25930000.3051758
2017	22760000.2288818
2018	18940000.5340576
2019	14739999.7711182
2020	20600000.3814697
2021	23079999.9237061
2022	17129999.1607666