Year	current US$
1970	459.0235357511776
1971	504.98730924281375
1972	576.6767891822842
1973	729.9090714187377
1974	979.6596248046266
1975	1016.4166156458652
1976	1133.3233437581077
1977	1337.14688121157
1978	1526.6905598401654
1979	1847.2537533433288
1980	2386.3063041846667
1981	2383.6558764029655
1982	2335.78342080336
1983	2243.964582197199
1984	2284.714384315612
1985	2257.589353126458
1986	2362.571671569915
1987	2720.116275282807
1988	2930.7262367556527
1989	2933.686562454268
1990	3298.025865591079
1991	3403.488010189514
1992	3642.368284193439
1993	3597.35120096065
1994	3800.0205354301997
1995	4281.0606254793365
1996	4435.546666759895
1997	4624.333253958511
1998	4681.812275073788
1999	4850.647989396889
2000	5023.085371793723
2001	4979.1149361135795
2002	5318.254028351207
2003	6213.289682984748
2004	7106.606724360584
2005	7876.590417935647
2006	8727.969923647846
2007	10108.679719076239
2008	10849.110267052936
2009	9492.50717760399
2010	9979.020224981741
2011	11060.039776860514
2012	11008.15376748699
2013	11302.456034480205
2014	11541.41912609146
2015	10568.240699750648
2016	10806.54781256623
2017	11730.881823877617
2018	12560.190138874907
2019	12581.223061767756
2020	11219.286610250027
2021	12920.699840484018
2022	14176.61405716012
2023	14884.756910533682