Year	constant 2015 US$
1991	4569.864956722327
1992	4492.34359227594
1993	4915.29687371407
1994	4844.090235377596
1995	4904.652342991526
1996	4822.538832458543
1997	4775.156746045207
1998	4796.407271530125
1999	4768.585611507556
2000	5326.4943834762225
2001	5587.230749631009
2002	5980.6296512039835
2003	5977.449903832161
2004	6158.948182228441
2005	6396.241891308182
2006	7080.851849456848
2007	7378.592566374629
2008	7573.115675107814
2009	7272.272748743437
2010	7199.760956510458
2011	7509.67456952481
2012	8054.909211404642
2013	7144.290193689247
2014	6769.80578259266
2015	6783.496669607744
2016	6756.070340776729
2017	7153.3299188303845
2018	6758.8566898559075
2019	7256.6224820403895
2020	7103.299955567458
2021	7290.131735965513
2022	7363.101049085605