Year	current US$
1995	13500000
1996	15199999.8092651
1997	9000000
1998	5800000.19073486
1999	7199999.80926514
2000	9600000.38146973
2001	6599999.90463257
2002	5800000.19073486
2003	4400000.09536743
2004	9000000
2005	4699999.80926514
2006	22200000.762939498
2007	29000000
2008	34000000
2009	31799999.237060502
2010	47200000.762939505
2011	64900001.525878906
2012	67900001.5258789
2013	67699996.9482422
2014	64400001.525878906
2015	60400001.5258789
2016	74699996.9482422
2017	72599998.4741211
2018	52900001.5258789
2019	62400001.5258789
2020	30899999.6185303