Year	current US$
1971	113.69566394767978
1972	127.53606684004447
1973	146.37856610225944
1974	190.54970301992543
1975	209.46458526447125
1976	211.85388669859566
1977	234.81484974552865
1978	260.49311102240773
1979	274.18990791142676
1980	331.8404820459697
1981	261.62770972496986
1982	206.45515932512254
1983	188.13300526092684
1984	173.18618416956053
1985	184.7811157700866
1986	255.3245321661255
1987	295.90418901518143
1988	324.17186692594885
1989	310.2970727506731
1990	368.7844052304404
1991	348.09195845455946
1992	359.9155661402521
1993	255.05852534001392
1994	192.15175523522217
1995	248.33346011403492
1996	281.48052784330133
1997	281.979144337477
1998	289.28276689664165
1999	287.32236724788163
2000	263.7548063458622
2001	255.60033259337902
2002	288.5538894871588
2003	339.9259181982885
2004	362.3590868138194
2005	352.83843510917177
2006	362.59235023638803
2007	380.16319204655053
2008	454.03208705167486
2009	442.7452185792195
2010	434.918133473027
2011	479.9769876329803
2012	416.0373117197932
2013	487.31852172450823
2014	521.3386139796551
2015	489.11695628858695
2016	686.6223779977404
2017	711.1395640127305
2018	794.589053988003
2019	790.4169008286622
2020	807.180026038789
2021	854.79541443012