Year	current US$
1980	8359744.5329044
1981	7721924.50330724
1982	7249247.01605328
1983	7506233.80827149
1984	7229354.25968192
1985	7680402.58078102
1986	10905823.2870853
1987	13218010.27096
1988	13913719.7471086
1989	13461446.7548916
1990	16727760.892521
1991	16943933.8968361
1992	18450290.4534217
1993	17733445.5901641
1994	12942358.642316
1995	15579701.8408359
1996	16604314.461135
1997	15274754.6413531
1998	7657930.10506533
1999	8029188.58104421
2000	7470246.6368541
2001	8162748.95118156
2002	9267745.00324964
2003	12038164.4699412
2004	14107246.7713854
2005	14744868.8094601
2006	15947087.1823445
2007	18456450.9636096
2008	21404593.1935984
2009	21420628.4633915
2010	21738308.3105431
2011	24775381.9880748
2012	24852699.4656318
2013	27661999.8462669
2014	28907722.7086649
2015	24585752.8614352
2016	25783683.2265257
2017	27407098.4465501
2018	30258122.0684355
2019	30399566.1972733
2020	31136881.6270855
2021	32975366.2421576