Year	current US$
1975	280000.001192093
1976	779999.971389771
1977	1190000.0572204601
1978	1649999.97615814
1979	2200000.04768372
1980	1620000.00476837
1981	970000.028610229
1982	949999.988079071
1983	1919999.95708466
1984	3039999.96185303
1985	4199999.80926514
1986	6639999.8664856
1987	6539999.96185303
1988	11220000.2670288
1989	9810000.4196167
1990	15600000.3814697
1991	16459999.0844727
1992	26000000
1993	26569999.6948242
1994	19719999.3133545
1995	17950000.762939498
1996	14439999.5803833
1997	9420000.07629395
1998	7000000
1999	6579999.92370605
2000	7139999.8664856
2001	8420000.07629395
2002	6489999.771118159
2003	7800000.19073486
2004	8510000.22888184
2005	8729999.54223633
2006	9449999.80926514
2007	14270000.4577637
2008	15680000.3051758
2009	16299999.2370605
2010	15829999.923706101
2011	16510000.2288818
2012	14493369.102478001
2013	16151126.861572301
2014	14726602.5543213
2015	18281753.5400391
2016	16471208.572387699
2017	18116270.0653076
2018	22905294.418335
2019	25520000.4577637
2020	21447000.50354
2021	23305000.3051758
2022	21947000.50354