Year	current US$
1970	120188.949691537
1971	136976.371253929
1972	187704.661165491
1973	355530.904015709
1974	331802.200250547
1975	389360.260174097
1976	254717.895231247
1977	357085.40908445
1978	323246.831693972
1979	464466.664270843
1980	531335.879531512
1981	486572.918329402
1982	500892.733292654
1983	669838.98531328
1984	461658.685030098
1985	688000.729820071
1986	888359.503262056
1987	1561423.62207658
1988	1472797.82823307
1989	1606360.53569615
1990	1529137.0121904
1991	1628559.21561759
1992	1772468.23079923
1993	1925690.11200017
1994	2033650.29010994
1995	2340772.49931196
1996	2374383.12595802
1997	1884356.12170296
1998	1698844.82935321
1999	2224706.24210635
2000	2183237.72887813
2001	1949086.67412294
2002	2097191.26737005
2003	2869275.79683271
2004	2464018.24193851
2005	2246621.76362811
2006	2880266.02052878
2007	4047235.22900834
2008	5762608.81241707
2009	5166437.56485169
2010	5583013.68540262
2011	6502821.26385516
2012	5991592.35983461
2013	5703589.3664844
2014	7625807.60614572
2015	5960140.41155561
2016	6374650.3533555
2017	7941617.43894185
2018	5561431.79844456
2019	5129590.7759337
2020	5645927.05211293
2021	5432636.63087366