Year	constant 2010 US$
2007	31790.6706412236
2008	31687.7275575241
2009	30607.1016272633
2010	30933.7282807623
2011	31095.712180659
2012	32878.2196910878
2013	33418.4932507282
2014	34354.2645032226
2015	34600.0920483543
2016	34467.6674054022
2017	34309.0997138188
2018	32844.0508667232