Year	US Dollars
1990	9091254593.64046
1991	9749290195.85884
1992	11315776985.7512
1993	12093164367.4083
1994	12830540383.5754
1995	13367049497.1943
1996	13306147972.0026
1997	13459830819.0376
1998	12889241189.8416
1999	12516451848.5542
2000	13209771590.5985
2001	15073738329.6763
2002	16648179473.1907
2003	18661714068.0522
2004	23453110635.5115
2005	25876394199.39009
2006	29010047847.2559
2007	37764073175.05789
2008	35762579097.51091
2009	36973530591.68071
2010	46065785698.48701
2011	55491749223.76709
2012	60741599310.07611
2013	67934614582.54581
2014	69486427003.8076
2015	59085434849.04989
2016	59115547449.43529