Year	current US$
1977	3420000.0241398746
1980	9549999.993294474
1981	9830000.098794691
1982	10530000.081285827
1983	11430000.033229591
1984	11099999.874830246
1985	11239999.912679192
1986	10640000.009909272
1987	11700000.025331967
1988	13729999.952018267
1989	18889999.967068426
1990	24230000.08612871
1991	24739999.912679203
1992	18899999.881163243
1993	21779999.950900666
1994	31379999.889060862
1995	39489999.53269958
1996	37510000.02771616
1997	40169999.5920062
1998	39390000.40665267
1999	34249999.88824129
2000	27570000.205188982
2001	43140000.20548699
2002	53729999.70987439
2003	51740000.42304399
2004	42940000.0423193
2005	42309999.91483987
2006	44219999.8795986
2007	52930000.266060226
2008	77849999.35328959
2009	78319999.98167159
2010	75770000.09454787
2011	73189999.2097169
2012	79741523.42230082
2013	77029361.307621
2014	79569827.46720314
2015	78648537.18131782
2016	66375782.221555725
2017	53593907.98211099
2018	51196920.05962134
2019	72313211.26967669