Year	US Dollars
1990	117787811208.10901
1991	132241089073.43698
1992	146837700893.65097
1993	166101094531.28799
1994	185233789205.11493
1995	208011820294.03799
1996	233029583771.73999
1997	252489317506.28104
1998	236316086953.03397
1999	250523866159.14197
2000	275426913297.07599
2001	285762970517.625
2002	308190986489.66797
2003	336652006195.09308
2004	370286803731.92395
2005	405734951592.81409
2006	448516230138.90295
2007	493467536169.57892
2008	522665133680.67291
2009	523996491708.492
2010	562876248284.34607
2011	609984394638.50293
2012	646356152815.0249
2013	690156672864.58789
2014	744937817901.19934
2015	795264924029.03052
2016	839033165089.47705
2017	905879774068.29785