Year	constant 2010 US$
1991	4047.90202067174
1992	4098.0809735063
1993	4004.98629866533
1994	3921.86395504095
1995	3966.72775713239
1996	4013.63928235081
1997	4091.28267491306
1998	4014.00312990723
1999	4103.26050487412
2000	4216.70837047383
2001	4358.95020089047
2002	4524.03057090503
2003	4668.58946900674
2004	4841.78724187801
2005	5069.12746848932
2006	5203.48383191886
2007	5459.29996188029
2008	5694.41069526614
2009	5866.24222801058
2010	6047.43253146933
2011	6197.36943152864
2012	6369.53089135984
2013	6567.44827820883
2014	6802.28070082559
2015	7001.84241282167
2016	7200.14178444044
2017	7379.5819897296
2018	7634.94118981386