Year	current US$
1983	688888.9074
1984	6446913.719
1985	12204937.93
1986	17962963.1
1987	20444444.66
1988	15851851.46
1989	15370369.91
1990	16111110.69
1991	17737037.66
1992	2059259.1759999997
1993	15429629.33
1994	21781480.79
1995	21207407.4074074
1996	25170370.3703704
1997	23000000
1998	23566666.6666667
1999	23951851.8518519
2000	23829629.6296296
2001	24133333.3333334
2002	24561711.1111111
2003	25114325.9259259
2004	26316296.2962963
2005	29123282.3895098
2006	30107002.6779753
2007	30969030.7433649
2008	31272406.0712732
2009	30314614.6780201
2010	31300672.4009646
2011	31823127.0200143
2012	32183265.3473663
2013	32624931.0253749
2014	35230047.9782303
2015	40500667.3486007
2016	38390538.5586423
2017	41863011.7808645
2018	42919945.9761155
2019	43217252.5983377
2020	56385185.1916142
2021	63257657.2662581
2022	61989718.7193693
2023	62891136.1694336