Year	current US$
1995	15687221946.98214
1996	18076563733.05943
1997	20927488971.91212
1998	21499951447.251823
1999	19382979002.27951
2000	22080150891.550167
2001	21198407655.726395
2002	18589747944.2109
2003	19306926198.233463
2004	21938023961.125103
2005	26189902364.498714
2006	29657335147.14941
2007	35284791344.579285
2008	40243789989.719986
2009	37668651382.65164
2010	45905839119.84063
2011	54498113136.70834
2012	59314670294.29884
2013	64942126491.728714
2014	66969882810.92556
2015	59337782066.61203
2016	60398218880.57395
2017	69958386559.36371
2018	69923884308.95729
2019	64890411785.938995