Year	constant 2010 US$
1991	2839.55575028728
1992	2839.3181459304
1993	3141.42805836983
1994	3083.64839242478
1995	3312.3285662133
1996	3403.1239474531
1997	3573.27321614087
1998	3817.99010970617
1999	3906.55546665496
2000	3874.55426769098
2001	4118.74104887593
2002	4384.28985856443
2003	4062.63585401133
2004	3739.93719957956
2005	3868.87262727316
2006	3795.7248219596
2007	3628.01035722086
2008	3673.61244787123
2009	3895.75878557018
2010	4122.98277741292
2011	4168.31650182666
2012	4539.52226998189
2013	4420.13642087892
2014	4525.79752321601
2015	5046.36526525028
2016	5152.08000546512
2017	5304.74832110153
2018	5370.95765931835