Year	constant 2015 US$
1991	3205.3836141059005
1992	3303.4770771587914
1993	3384.8245897331317
1994	3457.264723274722
1995	3551.761592050519
1996	3597.9595259772605
1997	3677.1654664001803
1998	3778.879606826203
1999	3978.6246897312803
2000	4018.9332141828613
2001	4033.547778224761
2002	4001.678261905471
2003	4078.4980231157833
2004	4213.130870737825
2005	4381.118132623846
2006	4642.003378405312
2007	4937.092497636517
2008	5204.437795885351
2009	5510.26479089258
2010	5829.4265844205875
2011	5971.130124633047
2012	6241.463376667205
2013	6423.144105806019
2014	6682.581775773963
2015	6943.537087320361
2016	7211.302021121345
2017	7282.860902391107
2018	7490.696927760908
2019	7644.045650540784
2020	7640.745727832778
2021	7945.7819402699
2022	8332.894802757477