Year	constant 2010 US$
1991	4381.80097467463
1992	4306.15293798537
1993	4683.1852016263
1994	4629.56885354041
1995	4696.20578561909
1996	4606.23203124463
1997	4553.41748298133
1998	4562.55883676786
1999	4520.38697122429
2000	5018.47545694553
2001	5303.83344997074
2002	5653.33614178128
2003	5623.77996793892
2004	5767.20832228653
2005	5964.37039083641
2006	6568.35729269189
2007	6851.37256148332
2008	7026.37322051526
2009	6769.10784585922
2010	6696.28029405529
2011	6968.88505930414
2012	7408.14883522008
2013	6619.91380207018
2014	6274.38495209993
2015	6281.14082122273
2016	6218.35521178973
2017	6746.56031666994
2018	6808.43868945452