Year	current US$
1977	7550000.19073486
1980	4260000.228881841
1981	3250000
1982	10640000.3433228
1983	14329999.923706101
1984	23120000.8392334
1985	12079999.923706101
1986	8729999.54223633
1987	6559999.94277954
1988	9760000.22888184
1989	10239999.7711182
1990	16559999.465942401
1991	11220000.2670288
1992	10289999.961853001
1993	7010000.228881841
1994	11899999.6185303
1995	11869999.8855591
1996	13270000.4577637
1997	8770000.45776367
1998	8310000.419616699
1999	6960000.03814697
2000	8970000.26702881
2001	11090000.1525879
2002	13210000.038146999
2003	6820000.17166138
2004	11260000.2288818
2005	13069999.6948242
2006	13460000.038146999
2007	13079999.923706101
2008	8770000.45776367
2009	12300000.1907349
2010	13300000.1907349
2011	14020000.4577637
2012	12603308.6776733
2013	9206686.97357178
2014	10656676.2924194
2015	10052622.795105
2016	7328520.29800415
2017	4502139.56832886
2018	4168889.9993896503
2019	5349728.58428955
2020	6812719.82192993
2021	6585881.23321533
2022	6193749.90463257