Year	current US$
1974	7382490.635
1975	17591100.69
1976	28039279.94
1977	39181098.94
1978	56236076.35
1979	72921585.08
1980	77002243.04
1981	62006073
1982	36949996.95
1983	43845420.84
1984	42065956.12
1985	40288208.01
1986	50822120.67
1987	60225616.46
1988	71116760.25
1989	91336494.45
1990	101049423.2
1991	117970527.6
1992	136306823.7
1993	108893981.9
1994	89481948.85
1995	98932296.362212
1996	84917981.8711026
1997	70106471.1259591
1998	89178475.7128406
1999	75026904.5400656
2000	85876253.1152284
2001	83064161.1242547
2002	76107818.0196352
2003	55401177.0875582
2004	63117010.2701726
2005	146939347.933076
2006	195673786.140392
2007	240793733.393634
2008	207863209.389345
2009	126457222.338888
2010	139569120.486052
2011	172185775.345679
2012	207763555.185996
2013	248800533.682456
2014	304659173.440494
2015	214449579.452891
2016	221726214.973562
2017	195776833.870766
2018	198742396.0148
2019	216993145.183503
2020	204623916.545632
2021	230914333.08778
2022	230705590.914253
2023	233249649.047852