Year	current US$
1995	3699775807.5038633
1996	4172443604.2793713
1997	5211610299.774209
1998	5065883831.159975
1999	4943195276.358543
2000	5793424863.892213
2001	5752532505.579933
2002	5023626218.663549
2003	5220931847.520299
2004	6092621820.886416
2005	7208835155.325892
2006	8164420173.077012
2007	9728755817.768084
2008	10648298534.519897
2009	10007058631.781971
2010	11612965918.845127
2011	13791609371.224512
2012	15996796745.704113
2013	17261716725.78755
2014	16530737947.950794
2015	14690944952.270329
2016	14609678488.698097
2017	17258152106.470856
2018	17177861168.750355
2019	15762396430.455761