Year	current US$
1984	17750000
1985	21049999.24
1986	24399999.62
1987	19350000.38
1988	16950000.76
1989	21950000.76
1990	18450000.76
1991	15600000.38
1992	19750000
1993	16500000
1994	12968000.41
1995	13896500
1996	17250000
1997	22700000
1998	23400000
1999	24416904.32
2000	24868381
2001	28397885.2124741
2002	26836163.7211132
2003	32151079.7313914
2004	33650128.5408451
2005	44693322.844602
2006	63811950.7870625
2007	73119263.1866794
2008	76489003.3131695
2009	78578401.6029387
2010	78134569.5922123
2011	75323553.8226013
2012	75945646.6882625
2013	74401710.3702047
2014	80334417.6238619
2015	84744074.5377817
2016	96671006.6813063
2017	90214516.2971224
2018	92512738.7840346
2019	96816750.1184866
2020	120683619.417896
2021	135359896.997178
2022	142416852.72081
2023	152048005.729001