Year	current US$
1970	252.47425648803818
1971	291.0067796831556
1972	378.10812885804114
1973	441.24190435928
1974	547.275428924216
1975	651.3776831268415
1976	651.6124764350798
1977	705.5923162382638
1978	807.3128806760183
1979	898.5988986881531
1980	1066.2894141839963
1981	1018.2883092698215
1982	964.7975614542681
1983	961.8000632622789
1984	910.6015191986256
1985	887.28838745797
1986	943.3167685043435
1987	984.9946840970133
1988	1019.2205155731616
1989	993.901345065026
1990	1209.9928132961131
1991	1237.1500601510195
1992	1313.3899004583222
1993	1191.4291667929203
1994	1272.1831147518778
1995	1467.2517835280375
1996	1559.8262861431836
1997	1681.445956636843
1998	1765.561714033639
1999	1837.897408006208
2000	1681.7865221789136
2001	1745.5374366998085
2002	1802.9238091926334
2003	2144.6473837251924
2004	2404.4721224055247
2005	2401.17389448143
2006	2540.687582325762
2007	2771.090507050115
2008	3050.175418726534
2009	3021.219702465519
2010	3235.6510846020437
2011	3290.4159814273667
2012	3173.283641683778
2013	3278.1991156713934
2014	3483.7201316504984
2015	3265.94035837837
2016	3168.2190546420843
2017	2980.2638083945963
2018	3009.1864081570493
2019	2951.3124602935486
2020	2936.8395978807525
2021	3227.999292058458