Year	US Dollars
1975	189999.99762
1976	14340000.15259
1977	10460000.03815
1978	9800000.19073
1979	11869999.88556
1980	11590000.15259
1981	12689999.58038
1982	15449999.80927
1983	11050000.19073
1984	15319999.69482
1985	9560000.41962
1986	10909999.84741
1987	55549999.23706
1988	24430000.30518
1989	10899999.61853
1990	8340000.15259
1991	8380000.11444
1992	11890000.34332
1993	7389999.86649
1994	10109999.65668
1995	10909999.84741
1996	13010000.22888
1997	12140000.34332
1998	8989999.77112
1999	6809999.94278
2000	7409999.84741
2001	12489999.77112
2002	16129999.16077
2003	8569999.69482
2004	10220000.26703
2005	10829999.92371
2006	16309999.46594
2007	11569999.69482
2008	16270000.45776
2009	15739999.77112
2010	12619999.88556
2011	30209999.08447
2012	20670000.07629
2013	24780000.68665
2014	31620000.83923
2015	53259998.32153
2016	25569999.69482
2017	28969999.31335
2018	27239999.77112
2019	37099998.47412
2020	42919998.16895
2021	33139999.38965