Year	current US$
1970	379802.713804718
1971	408337.718240436
1972	464186.626284398
1973	600931.624926954
1974	819916.773602946
1975	759067.859241344
1976	807566.486701941
1977	925728.563652407
1978	1006229.47310094
1979	1196524.05589654
1980	1435418.19373219
1981	2422259.48844559
1982	3369489.8410198
1983	4708651.67186826
1984	6664957.65271871
1985	6742451.98876912
1986	7728715.26457803
1987	9215865.56176985
1988	9683295.87241093
1989	9991377.13504433
1990	10144439.1622398
1991	10832127.1689377
1992	10756930.9001135
1993	11014261.2215544
1994	9589515.13572305
1995	10010030.821107
1996	10462481.9475222
1997	11784090.6332164
1998	12623835.4746176
1999	12708228.3203209
2000	14433678.4002878
2001	17155731.5758344
2002	18545939.3986373
2003	20470521.9863657
2004	20434703.5496661
2005	22604618.8943123
2006	22356624.089281
2007	23526590.8537241
2008	26243380.8177571
2009	27672086.8998524
2010	28740723.8208977
2011	29591988.4479432
2012	29540218.0725372
2013	31170296.2095303
2014	31360226.3812837
2015	33172457.8580075
2016	33186819.2927635
2017	33256545.9185413
2018	35659871.7732916
2019	38087528.5203354
2020	39653350.2616964
2021	43922796.4361641