Year	constant 2015 US$
1991	1158.807416937418
1992	1214.3299204989353
1993	1253.1848360891613
1994	1440.4189404227207
1995	1511.7643090699187
1996	1615.1574037692985
1997	1658.2876680866198
1998	1661.1341803835096
1999	1680.8823831406394
2000	1674.145089189574
2001	1706.0702406540147
2002	1746.1681240859484
2003	1777.6424031460542
2004	1923.9015433368254
2005	2061.0972662936324
2006	2227.766138562145
2007	2362.3213211938523
2008	2534.469433169093
2009	2689.3749681622076
2010	2841.543329111193
2011	3043.0701376396055
2012	3231.6914298964048
2013	3517.754293141407
2014	3815.4329001476517
2015	4073.0006546855498
2016	4285.608922445645
2017	4563.239935951234
2018	4836.089018623782
2019	5145.30100852094
2020	5501.6688544983535
2021	5878.5965652832465
2022	6113.886323300678