Year	current US$
1970	1443.5987973722613
1971	1649.947031366157
1972	2015.1180341784877
1973	2324.6366754864016
1974	2393.770754039407
1975	2852.4103175476134
1976	2759.33048277551
1977	3185.6288241094694
1978	3975.9034134836743
1979	4862.0161709196
1980	5625.179910569063
1981	5302.527513430843
1982	5301.825263122067
1983	5012.11674681006
1984	4740.2346532535885
1985	4943.8469696515795
1986	6735.04970723617
1987	7958.2806131211455
1988	8807.270512299581
1989	9050.672486048825
1990	11511.731737400703
1991	11546.710311255676
1992	12710.589392089207
1993	11914.630726425365
1994	12930.856230278889
1995	15304.226437200781
1996	16767.88143267862
1997	17871.612898186693
1998	19104.26102272521
1999	19985.81201682053
2000	19929.949526714627
2001	20897.799557381262
2002	23657.05078141066
2003	30561.340894614343
2004	35219.208178819936
2005	37328.6403236764
2006	39722.04914535995
2007	44491.23381005069
2008	44667.29920861584
2009	36126.139408819334
2010	33922.9980826575
2011	35191.62313105939
2012	32552.740140692327
2013	35850.357054952445
2014	38740.09170084548
2015	34222.82991613407
2016	35982.57777415766
2017	38093.974816269874
2018	41648.30044904543
2019	42297.1479151765
2020	39973.74021030144
2021	49607.17541532721