Year	US Dollars
1990	972056771855.927
1991	1023968834075.47009
1992	1046201762508.53003
1993	1114799547605.98022
1994	1182950005262.20996
1995	1290747216652.76978
1996	1326879067860.15991
1997	1388282922994.45996
1998	1390199607093.47998
1999	1406189416497.35986
2000	1511084520418.68994
2001	1564595704972.82007
2002	1641729640526.43018
2003	1692978624335.12988
2004	1848267484051.91968
2005	1966762516501.13965
2006	2103517934701.81006
2007	2288208830088.17969
2008	2435940536755.50977
2009	2453193475006.12988
2010	2720774198435.60059
2011	2897463706878.93945
2012	3022760389490.11963
2013	3193729748296.30957
2014	3241940769976.10986
2015	3157555295418.65967
2016	3090159703782.72021
2017	3173409321770.64941