Year	current US$
1970	31049054.5852436
1971	31274077.5269885
1972	32036882.2784124
1973	37577658.5017078
1974	42167276.7459477
1975	51919538.8447659
1976	53388325.0511214
1977	61930366.1112024
1978	70201189.3341152
1979	91490404.1046236
1980	108492905.985756
1981	112746710.464223
1982	121637005.132652
1983	133178672.637906
1984	124791748.269813
1985	144226770.911185
1986	151432112.458991
1987	147417881.701254
1988	139823875.414985
1989	148948226.024447
1990	147399211.209923
1991	147444875.881608
1992	136864512.769631
1993	122084249.852003
1994	118463388.111322
1995	131995882.930313
1996	117569942.075982
1997	132017834.201317
1998	113926266.56174
1999	103340306.069696
2000	115250060.392012
2001	116256072.4371
2002	106865912.743014
2003	100678253.806325
2004	118586985.540583
2005	152783359.031208
2006	160777535.905135
2007	201123443.223961
2008	231183900.498122
2009	251231869.4915
2010	279957049.433446
2011	300841116.07429
2012	317209308.864389
2013	307107666.969461
2014	328959632.05317
2015	391128239.636736
2016	331176798.597815
2017	363342455.010844
2018	374327711.385457
2019	375707204.913359
2020	404340633.800504
2021	443048949.172583