Year	current US$
1977	14509803.92725878
1978	15803921.57482509
1979	16588235.30062287
1980	17764705.889319487
1981	20835555.56296375
1982	17833333.33927774
1983	25800000.00859996
1984	23489055.625073068
1985	46709024.650156826
1992	102392000
1993	111855000
1994	117075000
1995	129565000
1996	140100000
1997	148100000
1998	141800000
1999	147000000
2000	169300000
2001	172000000
2002	172300000
2003	156800000
2004	160893000
2005	147866000
2006	147644000
2007	172897000
2008	211880848.717585
2009	170307045.715201
2010	248050307.384227
2011	297598304.335455
2012	297769918.965279
2013	164690000
2014	180840766.25109
2015	144839382.831974
2016	165773383.194018
2017	179578551.962963
2018	157128216.871166
2019	224977892.542753
2020	201391661.996342
2021	271179146.999344
2022	216559582.478466