Year	constant 2010 US$
1990	3813.00422559686
1991	3601.96651222995
1992	3308.26250329061
1993	3083.97398198299
1994	3053.97088037203
1995	3030.04831085975
1996	3048.29932386747
1997	3068.27409703684
1998	3151.51687272759
1999	3252.57630894312
2000	3385.50929120161
2001	3304.88842054889
2002	3331.04513920104
2003	3395.14248737601
2004	3568.46789300819
2005	3688.73193713855
2006	3925.95846901301
2007	3996.60651886745
2008	4365.62611093327
2009	4367.28645408997
2010	4479.59675975779
2011	4564.65389131344
2012	4521.24278477004
2013	4638.60855299603
2014	4825.90844223737
2015	4938.6170423275
2016	5024.24434353896
2017	5031.52853047154
2018	5152.94141921459