Year	current US$
1995	2039798538.712419
1996	2193612819.8474607
1997	2207687329.2323666
1998	2556534097.558246
1999	2753577228.946927
2000	3608101013.0304937
2001	3818213331.7051587
2002	3753872717.374161
2003	5108041584.621882
2004	6786929489.82136
2005	8198401716.707626
2006	9216793002.915453
2007	10814437317.784258
2008	12384000000.000002
2009	11364000000.000002
2010	12880000000.000002
2011	16468000000
2012	15519000000
2013	15058000000
2014	18514000000
2015	19310000000
2016	21311999999.999996
2017	24111999999.999996
2018	27070999999.999996
2019	28371999999.999992