Year	constant 2010 US$
1991	3807.58383630289
1992	3773.54297031264
1993	3739.15462645413
1994	3833.92218359392
1995	3976.13472922779
1996	4132.11777591151
1997	4019.87808642244
1998	4277.0948107992
1999	4288.24904986906
2000	4429.22056382729
2001	4460.05839315188
2002	4521.38245623103
2003	4720.94705667837
2004	4655.19451956734
2005	4815.14043703046
2006	5057.31728037101
2007	5443.83455051732
2008	5601.58403120524
2009	5284.8416809046
2010	5706.12273556427
2011	5841.93910759525
2012	6187.98286551871
2013	6645.67005479527
2014	6843.37426287087
2015	6713.85045189305
2016	6607.1140126207
2017	7043.38186750897
2018	7036.47201763782