Year	constant 2010 US$
1991	6195.31178516875
1992	6137.08051975316
1993	6268.08501618634
1994	6168.95743299436
1995	6226.29976684452
1996	6178.9345419345
1997	6187.54806219514
1998	6112.17870505827
1999	6162.16845868119
2000	6104.80477635315
2001	6178.22707060589
2002	6407.11411605341
2003	6440.66673697056
2004	6632.92066918658
2005	6753.29851462274
2006	6653.23803900815
2007	6856.50938958115
2008	6876.69184430168
2009	7003.76449150179
2010	7219.66537743145
2011	7284.33327926376
2012	7251.30670943903
2013	7347.14501517541
2014	7408.3945308892
2015	7340.86786927024
2016	7263.16536205521
2017	7154.30241508852
2018	7758.74806413584