Year	current US$
1984	6800000.191
1985	6400000.095
1986	4650000.095
1987	5349999.905
1988	6000000
1989	6000000
1990	7150000
1991	5700000
1992	6000000
1993	6000000
1994	6568500
1995	6881500
1996	6875000
1997	7550000
1998	6900000
1999	5972124.5
2000	6435358.715
2001	16029825.407302
2002	16651088.7717685
2003	19749508.9657851
2004	18013818.1394635
2005	19332237.978542
2006	20608628.3376499
2007	21454975.4159218
2008	27977571.046179
2009	22508922.2045363
2010	21991807.7054283
2011	23529361.4356243
2012	26326846.2259462
2013	31523217.6742768
2014	33269797.5072743
2015	41161360.5304401
2016	45202220.8003739
2017	45607619.8901334
2018	42979100.7358568
2019	41881051.8284085
2020	42407418.7359842
2021	41695830.9735939
2022	41395472.3829643
2023	42578576.6669921