Year	constant 2015 US$
1991	5009.314251885249
1992	5064.652955960792
1993	4983.490889167381
1994	5033.531772858813
1995	4952.395224930078
1996	4947.525164985514
1997	4777.997711580204
1998	4835.406694485657
1999	4860.171119910594
2000	4916.811374475995
2001	4964.907671977622
2002	4927.149170187374
2003	4916.935191528893
2004	5312.624275890639
2005	5571.479110977189
2006	5621.286141101704
2007	5902.472867039391
2008	6175.41698796591
2009	6372.919630778326
2010	6654.062246460945
2011	6749.403019827947
2012	6889.27747498056
2013	7122.871650500625
2014	7354.873000666388
2015	7520.635850748135
2016	7567.357876416632
2017	7524.6847694239295
2018	7589.88227278976
2019	7698.379866629017
2020	7517.324587467556
2021	7646.485879563318
2022	7751.204538928543