Year	constant 2015 US$
1991	4921.89338140572
1992	5250.96415305789
1993	5191.755005711677
1994	5437.305618993965
1995	5261.601891097644
1996	5245.587750025481
1997	4845.130187567222
1998	4948.434263075802
1999	4995.677036801046
2000	5236.796244280483
2001	5223.220761295379
2002	4839.7270771312205
2003	4964.805449947528
2004	5231.97405265166
2005	5546.259937223218
2006	6017.468642856472
2007	6226.7654140667055
2008	6374.2278662085155
2009	6170.052348871204
2010	6197.007907480197
2011	6331.507208466145
2012	6550.658178155205
2013	6667.426553930216
2014	6783.594120370153
2015	6934.001375466268
2016	7309.256284241225
2017	7346.357141465558
2018	7398.400098734442
2019	7627.746907707388
2020	7486.245532653437
2021	7557.109714722625
2022	7683.8533906834155