Year	current US$
1960	0
1961	4399999.9165535
1966	6760000.10967255
1967	18579999.6852875
1987	0
1988	0
1989	40139999.3896484
1990	56699997.9019165
1991	113399999.65578301
1992	175099993.018433
1993	118710002.670065
1994	122980001.384392
1995	72339999.6943772
1996	82360000.46134
1997	105680002.057925
1998	72439999.0141392
1999	66540001.9455701
2000	48200001.0982156
2001	47929998.4276295
2002	41079999.4952977
2003	37070000.693202
2004	39470000.0975281
2005	43920000.102371
2006	47600000.2622604
2007	51519999.2842972
2008	62730001.002550095
2009	96530000.5935133
2010	144100003.27602
2011	235700002.446771
2012	92099998.0345368
2013	76220000.0360608
2014	65259999.6905774
2015	34619999.706745096
2016	46040001.2806058
2017	38530000.0850111
2018	46019999.6829033
2019	48840000.0017136
2020	60209998.1512874
2021	50180000.5882978
2022	38570000.901818246