Year	current US$
1961	23469999.3133545
1966	2859999.89509583
1967	18469999.3133545
1989	9300000.19073486
1990	11710000.038146999
1991	12930000.3051758
1992	16250000
1993	19840000.1525879
1994	18100000.3814697
1995	24030000.6866455
1996	33500000
1997	29360000.6103516
1998	23930000.3051758
1999	19780000.6866455
2000	13350000.3814697
2001	11869999.8855591
2002	14439999.5803833
2003	19489999.7711182
2004	715479980.46875
2005	20930000.3051758
2006	20079999.9237061
2007	19129999.1607666
2008	19110000.6103516
2009	-9850000.38146973
2010	-12800000.1907349
2011	-7489999.771118159
2012	1539999.96185303
2013	-9680000.30517578
2014	-23020000.4577637
2015	-19399999.6185303
2016	-22739999.7711182
2017	-23280000.6866455
2018	-23049999.237060502
2019	-22170000.0762939
2020	-23829999.9237061
2021	17840000.1525879
2022	-52729999.5422363