Year	current US$
1970	1799499.43181697
1971	789229.827447535
1972	978927.732866242
1973	1263440.04431469
1974	0
1975	0
1976	0
1977	0
1978	0
1979	0
1980	44445.2541258906
1981	861122.298205058
1982	20783765.1398555
1983	9400559.42421581
1984	4045354.07610459
1985	1197192.58466735
1986	1359189.24608683
1987	0
1988	0
1989	0
1990	0
1991	0
1992	0
1993	0
1994	0
1995	0
1996	0
1997	0
1998	0
1999	0
2000	22749897.5619623
2001	0
2002	0
2003	730403.460003793
2004	2745560.00487464
2005	19298850.669859
2006	11887740.6990157
2007	17510244.7236006
2008	16056735.9143271
2009	12521273.8509486
2010	18500533.0570259
2011	15155781.1311789
2012	21120537.4464113
2013	31618729.4317084
2014	38843195.6636276
2015	34321328.5162476
2016	26472876.8470725
2017	24362931.0664985
2018	29441009.7800555
2019	22406184.9098809
2020	19347633.4591115
2021	21866222.1267514