Year	constant 2015 US$
1995	14322160039797.107
1996	14602274914885.234
1997	14994054149430.967
1998	15462217392484.12
1999	15944554331595.97
2000	16495064044699.094
2001	16871774626915.605
2002	17107823495252.973
2003	17402881216205.871
2004	17899636363900.246
2005	18314551839795.105
2006	18870048538092.61
2007	19378865308660.75
2008	19320300316061.992
2009	18777796422760.824
2010	19221200790569.66
2011	19446861096643.527
2012	19406592530072.99
2013	19546331739992.598
2014	19925402122298.39
2015	20366358158404.28
2016	20725718890597.684
2017	21261817114378.16
2018	21685323576095.258
2019	22116999965054.96
2020	20765723115144.17
2021	22056021002670.49
2022	22388618536419.465