Year	constant 2015 US$
1995	22933.71109936375
1996	23359.03716401953
1997	23934.268601354983
1998	24676.658772172526
1999	25407.108234758794
2000	26107.549596936733
2001	26626.678544632934
2002	26872.62451891948
2003	27082.269669148714
2004	27716.330376391652
2005	28111.035513244355
2006	28947.99007201021
2007	29720.991374892306
2008	29581.866687980553
2009	28635.528907423122
2010	29103.993518046787
2011	29502.510541615036
2012	29247.011046023003
2013	29272.879654166263
2014	29732.45677176075
2015	30457.79270469178
2016	31168.056192302378
2017	31917.376655909746
2018	32514.257857917673
2019	33112.8254772059
2020	31246.050251126013
2021	33174.682908503935
2022	33525.09098516442