Year	current US$
1977	5849999.925121659
1980	12649999.931454657
1981	13389999.898150563
1982	14010000.092908734
1983	15099999.984726317
1984	13799999.862909311
1985	14579999.929293992
1986	12770000.079646703
1987	13859999.980777496
1988	17580000.063404452
1989	20100000.115111474
1990	24370000.015944242
1991	22840000.037103888
1992	16850000.092759743
1993	20470000.02115965
1994	30339999.92907048
1995	40749999.7764826
1996	38899999.80293213
1997	41949999.99180436
1998	38890000.05461276
1999	33480000.020936117
2000	30400000.333786026
2001	51030000.170692794
2002	66919999.39829112
2003	63450000.18551948
2004	60729999.870061874
2005	58219999.9690056
2006	63309999.94277953
2007	70810000.62823294
2008	97629999.45878981
2009	97439999.78899957
2010	100339999.55654144
2011	94109999.17984007
2012	98053410.11285782
2013	109078181.14757533
2014	103087517.73834227
2015	97758928.80558968
2016	81240163.62428665
2017	71294712.78190613
2018	71482030.27248384
2019	103190034.56830977
2020	109342639.98270035
2021	119601339.63823317
2022	133547571.30146025