Year	current US$
1970	10859999.954700477
1971	13440000.146627422
1972	18639999.715611324
1973	16360000.262036914
1974	27790000.13694164
1975	34989999.52152371
1976	23640000.216662884
1977	31019999.42958358
1978	46470000.416040376
1979	73020000.24914747
1980	76419999.36103822
1981	64649999.32050705
1982	65850001.0371208
1983	67919999.1077185
1984	65399999.856948845
1985	63439999.580383286
1986	77620000.24318698
1987	85440000.68306927
1988	103100000.67949294
1989	121419999.71866596
1990	142370000.4313141
1991	104159998.1784821
1992	142699998.85559088
1993	127950000.4053115
1994	145199999.8092651
1995	123750000.05960467
1996	121730003.17811963
1997	74260000.70571895
1998	68109999.5374679
1999	66930000.36478037
2000	70500000.11920932
2001	73430000.12636188
2002	67329999.20845032
2003	71139998.85320668
2004	71859999.1202355
2005	84729998.58856201
2006	92210001.94549565
2007	106570000.41007993
2008	122179997.86138542
2009	136820000.17166138
2010	140170001.62601465
2011	136120001.7929077
2012	116475523.41222766
2013	124570547.0442772
2014	144758017.7187919
2015	151460673.3322142
2016	168596643.09024808
2017	175599532.00817114
2018	170479988.2173538
2019	177320001.60217282
2020	156915002.5844574
2021	139838998.73495108
2022	135049001.03807443