Year	constant 2010 US$
2004	16123.3319738252
2005	17181.4492761811
2006	18024.1916992043
2007	18849.4539883613
2008	19187.4087891932
2009	18037.5516061829
2010	18345.6247917049
2011	18611.0386918712
2012	18712.1049739751
2013	18649.865921194
2014	18962.4317370881
2015	19926.7667704737
2016	20424.9969327174
2017	21347.1103444709