Year	constant 2015 US$
1995	4785.266204990272
1996	4993.704937087879
1997	5133.764859272941
1998	5383.718610901096
1999	5478.002565270673
2000	5686.233911602148
2001	5953.401432760534
2002	6254.327703309738
2003	6490.911951743732
2004	6902.46703186522
2005	7391.241481239484
2006	7841.951044505681
2007	8440.281315215321
2008	8935.68027076041
2009	8698.261345792778
2010	8720.330071405537
2011	8940.68931674617
2012	9051.733568630447
2013	9202.294913987562
2014	9598.476352706777
2015	10092.211052742145
2016	10443.3199606143
2017	11047.639434505887
2018	11615.491323676162
2019	12174.999309662157
2020	11913.24933784244
2021	12590.035444220892