Year	US Dollars
1990	2715656063.06796
1991	2875751369.02997
1992	2954788592.45118
1993	2858621634.05524
1994	2973435616.2754
1995	3099209706.18748
1996	3216596420.00867
1997	3419301904.19603
1998	3506117698.64315
1999	3343696569.72053
2000	3635511706.40937
2001	3006266728.5609
2002	3734168724.37525
2003	4018713449.09809
2004	4428085439.13085
2005	5073243598.61624
2006	5665975650.98215
2007	6238123578.95412
2008	6668184593.01571
2009	6890098163.74226
2010	7150755981.41501
2011	7445199966.48529
2012	7956951670.09204
2013	8436550684.37717
2014	8716650557.44035
2015	8653938609.57619
2016	8073732409.20096
2017	8050241494.25428