Year	current US$
1979	7404522.24613864
1980	7667432.4371815
1981	7194411.67763533
1982	6910955.62643231
1983	7413374.48587906
1984	9276638.37279047
1985	8759400.31419762
1986	8758182.60802213
1987	8787285.69209554
1988	9570479.83991729
1989	7116282.04777579
1990	7369057.39820127
1991	8497757.32091693
1992	8834323.60078854
1993	8480561.56618669
1994	9814072.50547655
1995	11647667.0879051
1996	12580134.3203686
1997	13284270.2663316
1998	17048796.2301677
1999	13829339.7074569
2000	15905566.2572751
2001	13686578.3969721
2002	13625773.4180251
2003	16397185.8031291
2004	19050301.385097
2005	20434652.4640372
2006	23375937.123634
2007	27595720.317922
2008	33251029.8048438
2009	28637859.3534993
2010	32142288.7571838
2011	36669668.6876518
2012	33917642.3788101
2013	35957896.6854126
2014	36673066.9362264
2015	34262281.8379121
2016	36218871.0028296
2017	39421652.4373523
2018	28720507.5686268
2019	16597799.0922911
2020	19992013.5885744
2021	21295507.5163609