Year	constant 2015 US$
1995	4544745416131.299
1996	4809743436478.133
1997	5045913320160.705
1998	5182906062099.167
1999	5365051310072.408
2000	5670801690343.169
2001	5845650201911.985
2002	6051784729834.711
2003	6312159726640.225
2004	6685346888071.974
2005	7134623814492.07
2006	7609922848942.156
2007	8207303474111.232
2008	8638406033648.366
2009	8923974024542.723
2010	9607643590603.133
2011	10410328507810.336
2012	11028092945547.816
2013	11674918037116.29
2014	12264847033344.104
2015	12867023602743.832
2016	13509215129505.213
2017	14307794909666.713
2018	15067189716819.357
2019	15716182224700.271
2020	15154320644268.287
2021	16608157014865.55
2022	17437448303707.016