Year	US Dollars
1990	757305514.02336
1991	759158792.64984
1992	788607381.54453
1993	833186539.64138
1994	920655832.78566
1995	953870470.19425
1996	1038999299.74622
1997	1145317388.77532
1998	1141020849.20337
1999	1219368420.76207
2000	1606577591.16987
2001	1779116813.23345
2002	1971245210.28098
2003	2148822077.25223
2004	2336760333.61583
2005	2606501161.03664
2006	2900197436.4975
2007	3478035576.64018
2008	3663793609.78664
2009	3884965691.48926
2010	4322755311.85175
2011	4724439198.53529
2012	4972724778.89177
2013	5213273957.6323
2014	5610077484.5725
2015	5917365493.00495
2016	6511506435.0386
2017	7151063993.27009