Year	current US$
1995	2169375778.3566256
1996	2339667347.4319563
1997	2438391025.233681
1998	2892143066.6614923
1999	3134471547.331105
2000	3042986471.725651
2001	3628225810.340784
2002	3914190725.781702
2003	4600175431.157373
2004	5299920424.629229
2005	6440065966.420441
2006	7253625944.64481
2007	8891560408.928923
2008	9980561784.544758
2009	9528506501.862768
2010	9910939980.875612
2011	12202929229.36287
2012	14148822902.134785
2013	14889545709.963223
2014	15621715576.352043
2015	15163804029.474667
2016	15777030392.830894
2017	16462865233.783535
2018	19734803845.217728
2019	20858320354.98198