Year	current US$
1995	2170304556.616815
1996	2264529067.0343323
1997	2531007713.798258
1998	2611922282.653701
1999	2631357834.9843197
2000	2774977747.3517847
2001	2456603536.0197124
2002	2464638216.431878
2003	2755895381.3728905
2004	3166693183.8962693
2005	3768182312.035439
2006	4268949904.8771553
2007	4842951081.328197
2008	5307710471.726505
2009	4567606836.929435
2010	4402891432.98927
2011	5017429999.903664
2012	5666895068.784551
2013	6583744763.624993
2014	6680713615.862916
2015	6659938406.8249655
2016	6971464200.249612
2017	7131116051.914138
2018	7741170339.782385
2019	7477233079.382165