Year	constant 2015 US$
1992	10191813438.783197
1993	9862817347.9164
1994	9615316088.3789
1995	9675213141.779291
1996	12456617721.900383
1997	14143199362.068352
1998	15331405563.97382
1999	13017740552.17929
2000	11425612853.90312
2001	12909791604.998823
2002	12874539051.924994
2003	12302402087.180853
2004	13028933318.219915
2005	15236248190.909369
2006	16277670275.436712
2007	17924097534.58007
2008	18585613529.254288
2009	14917756968.09101
2010	16194292600.732023
2011	18477015517.032803
2012	16634953397.449991
2013	16835807406.526945
2014	17339001459.27343
2015	21048587909.766006
2016	19109605401.13554
2017	19664827841.862103
2018	20213303334.700775
2019	21572043886.921085
2020	19230115143.750774
2021	19903764771.39687
2022	21035388034.906242
2023	23263621663.63554