Year	constant 2011 international $
2004	16587.1209967929
2005	18273.2898800795
2006	19833.6467651549
2007	21880.9176311228
2008	22755.6047404754
2009	20672.4699839997
2010	20672.2958843003
2011	22015.3937806496
2012	23325.8137927453
2013	24491.6581639849
2014	25912.3230084155
2015	25923.6376523988
2016	26860.076624264
2017	28374.7310287533