Year	current US$
1977	13476465.5555555
1978	21279589.2592592
1979	22323882.5925926
1980	28420604.4444444
1981	23278078.5185186
1982	36041316.6666667
1983	48448919.2592593
1984	46323585.9259259
1985	59107582.5925926
1986	71066144.4444445
1987	71342839.2592593
1988	107921254.074074
1989	96874525.5555556
1990	164707398.888889
1991	162226481.481481
1992	197188851.851852
1993	229186962.962963
1994	234892888.888889
1995	129662592.592592
1996	137398703.703704
1997	143234925.925926
1998	149767296.296296
1999	154206962.962963
2000	148979148.148148
2001	133937518.518519
2002	122943222.222222
2003	167636555.555556
2004	189635925.925926
2005	264568000
2006	208474629.62963
2007	172791185.185185
2008	195457370.37037
2009	334727000
2010	327229407.407407
2011	283532629.62963
2012	345127518.518518
2013	342980296.296296
2014	346235925.925926
2015	421744185.185185
2016	263207666.666667