Year	constant 2015 US$
1995	1995.5553051208806
1996	2148.63448333221
1997	2251.6814802002837
1998	2297.1730110334133
1999	2383.7033037276774
2000	2546.697736716099
2001	2673.943448256867
2002	2836.7998051345385
2003	3015.5443722360287
2004	3276.180116888937
2005	3543.787538265242
2006	3915.9228161720744
2007	4361.981400518934
2008	4566.914982578412
2009	4705.016949032894
2010	5044.290034390637
2011	5269.753149790201
2012	5598.532527294484
2013	5814.764312015429
2014	6091.496865140572
2015	6265.109993362202
2016	6501.8620372893465
2017	6848.979664420373
2018	7068.283604563839
2019	7286.48113439214
2020	7181.5722552712405
2021	7567.701554705982