Year	constant 2015 US$
1991	3205.3836141059
1992	3303.477077158791
1993	3384.8245897331317
1994	3457.2647232747227
1995	3551.7615920505186
1996	3597.9595259772605
1997	3677.1654664001803
1998	3778.879606826203
1999	3978.624689731281
2000	4018.9332141828604
2001	4033.5477782247617
2002	4001.6782619054716
2003	4078.4980231157833
2004	4213.130870737824
2005	4381.118132623846
2006	4642.003378405312
2007	4937.092497636517
2008	5204.437795885352
2009	5510.26479089258
2010	5829.426584420587
2011	5971.130124633047
2012	6241.463376667204
2013	6423.144105806017
2014	6682.581775773963
2015	6943.53708732036
2016	7211.302021121345
2017	7282.860902391107
2018	7490.6969277609105
2019	7644.045650540782
2020	7640.745727832775
2021	7945.781940269899
2022	8332.894802757477