Year	constant 2015 US$
1991	8163.8963189573615
1992	8119.544048628899
1993	8036.523010520564
1994	8015.254862767551
1995	7900.441765999215
1996	8076.96829842656
1997	8270.289622430148
1998	8305.830871514856
1999	8460.25189116592
2000	8638.197001929946
2001	8778.895395944422
2002	8895.288217188483
2003	9058.26449903705
2004	9320.857054805861
2005	9714.402683075903
2006	10140.681369466876
2007	10878.605545499735
2008	11316.715352564168
2009	11471.24233463447
2010	11925.43233819922
2011	12297.726281492423
2012	12726.772009739343
2013	12953.997634513678
2014	13164.011567384583
2015	13370.314335668869
2016	13710.202630332638
2017	14151.200789454331
2018	14580.344528711406
2019	14955.394409344179
2020	15176.228507090213
2021	15796.761483187898
2022	16043.36021318995