Year	current US$
1993	25214372.7139955
1994	31984991.3043478
1995	51162757.0543893
1996	53111472.9909706
1997	51646350.9847448
1998	56032874.8227122
1999	33286541.0066123
2000	34228696.4792465
2001	31747330.2236617
2002	18916719.4092594
2003	32805914.4981789
2004	31712648.1368738
2005	35048069.4804832
2006	27929691.0104478
2007	32192057.3292874
2008	21537698.4776801
2009	0
2010	0
2011	0
2012	0
2013	0
2014	0
2015	0
2016	0
2017	0
2018	0
2019	0
2020	4656820.78227375
2021	5079230.05551076