Year	current US$
1970	219104.204402029
1971	365146.233948972
1972	272356.293409334
1973	379765.221178855
1974	439832.988388909
1975	620219.077281746
1976	479072.05891602
1977	617156.6310195
1978	805386.236444624
1979	1035886.53190532
1980	1184659.06640164
1981	940714.990586898
1982	1468061.73407089
1983	1186905.24796381
1984	1003804.38103187
1985	569942.810540626
1986	1083258.14663133
1987	1064067.64429508
1988	1051208.45078054
1989	1124278.16783957
1990	1022971.26781775
1991	972036.429547578
1992	915855.506440614
1993	640992.663452035
1994	771134.061600956
1995	1159985.02968222
1996	1215168.88735632
1997	1188368.33068732
1998	1576231.2882091
1999	255924.962603028
2000	277395.461224704
2001	179394.268136776
2002	95848.8528661383
2003	34681.5907485112
2004	0
2005	0
2006	0
2007	0
2008	0
2009	0
2010	0
2011	0
2012	0
2013	0
2014	0
2015	0
2016	0
2017	0
2018	0
2019	0
2020	0
2021	0