Year	constant 2015 US$
1991	5561.2860681986285
1992	6053.5883163521075
1993	6209.277055448856
1994	6384.54002759377
1995	6533.922429824188
1996	6720.464903304151
1997	6557.171720846341
1998	7021.875842813679
1999	6285.646125979065
2000	6364.159746051339
2001	6052.46816039016
2002	6803.546238433654
2003	6991.596301746549
2004	6724.181078360032
2005	7446.261702809232
2006	8052.494928239506
2007	8283.369746976574
2008	6886.892731866441
2009	7297.209112512704
2010	8450.428114362529
2011	9192.841265272215
2012	8925.544595777554
2013	9790.226430321558
2014	10674.65892233893
2015	10450.026899933038
2016	10963.923796749079
2017	10922.706627247962
2018	10436.356956234034
2019	10953.365664261351
2020	11976.592165313868
2021	12511.423619825506
2022	12288.405228041547