Year	constant 2015 US$
1995	22083.504572788726
1996	22237.877183263216
1997	23161.319692977107
1998	24015.05511731133
1999	24463.700815190437
2000	23805.75557275133
2001	23628.325253566403
2002	23464.6553531098
2003	23788.52655043884
2004	24718.18038727493
2005	25243.51637612181
2006	26886.802802132155
2007	27774.288793863092
2008	27826.36908080951
2009	26696.39752584488
2010	26833.210712189153
2011	27494.216989177377
2012	27707.453041495886
2013	26640.174276740094
2014	26663.558890383018
2015	28099.79192280707
2016	27423.4378174992
2017	27773.176099945867
2018	27971.20387165137
2019	28070.49490494961
2020	26930.60049297166
2021	28248.694397023803
2022	28481.7598258212