Year	current US$
1994	57279998.779296905
1995	32310001.373291
1996	46770000.4577637
1997	40840000.1525879
1998	27889999.3896484
1999	31569999.6948242
2000	30780000.6866455
2001	16870000.8392334
2002	23829999.9237061
2003	21620000.8392334
2004	17010000.2288818
2005	17690000.5340576
2006	19010000.2288818
2007	17379999.1607666
2008	19010000.2288818
2009	15850000.3814697
2010	18229999.5422363
2011	14869999.8855591
2012	19340000.1525879
2013	14310000.4196167
2014	15800000.1907349
2015	8119999.88555908
2016	5289999.96185303
2017	4409999.84741211
2018	5329999.92370605
2019	5869999.88555908
2020	4659999.84741211
2021	3990000.00953674
2022	980000.019073486