Year	US Dollars adjusted for inflation)
1996	8409123326.6721
1997	8838322001.68145
1998	9458649179.85726
1999	9827015712.1923
2000	10279352467.9624
2001	10683077686.9643
2002	10741888559.6855
2003	10995044036.4811
2004	11882815633.0412
2005	12642190112.0744
2006	13276472485.9658
2007	14528215567.9068
2008	14769226133.028
2009	13808450397.2785
2010	13310567802.9356
2011	13571857440.1318
2012	13750905539.0123
2013	14343313507.9883
2014	14658916160.793
2015	15290908623.4238
2016	16434890343.1097
2017	17033486324.1295