Year	constant 2015 US$
1991	9736.924680728
1992	9729.892513272422
1993	9665.65928348938
1994	9214.98382011654
1995	9221.355537861004
1996	9480.009902222433
1997	9850.154612384405
1998	10052.710021218838
1999	9867.21753021551
2000	10311.036780290417
2001	10326.484088988585
2002	10662.472241489637
2003	11021.196678886008
2004	11730.115363905506
2005	12192.936728757024
2006	12638.87658759391
2007	13268.661374811008
2008	13424.641754371756
2009	12957.739972462174
2010	13416.764762686686
2011	14099.457984979734
2012	14616.746208352874
2013	15214.753442009842
2014	15672.895050666128
2015	15775.077290779036
2016	15822.799181020317
2017	16460.677512682294
2018	16882.18978481856
2019	17183.113655284647
2020	17648.802834770577
2021	19127.329194933904
2022	23849.70257661993