Year	constant 2010 US$
1995	4113.96543956129
1996	3889.34179011372
1997	3159.39630797847
1998	3472.93220787691
1999	3647.01962033546
2000	5011.94402765529
2001	5236.07936280826
2002	5243.33493810338
2003	5811.09093332408
2004	6384.96433809005
2005	7520.85401234226
2006	7167.62025157341
2007	8517.93856347207
2008	10236.2937236575
2009	12201.1192173598
2010	12698.2617101869
2011	11907.2420477828
2012	13324.5254822197
2013	14224.1802827849
2014	15326.949002877
2015	16080.1589627721
2016	14979.4922169668
2017	16985.284065136
2018	17880.3677733627