Year	constant 2010 US$
1991	9181.10493080338
1992	9026.88261124269
1993	8773.74692487356
1994	8691.82386206722
1995	8744.23058000067
1996	8831.73250602832
1997	8969.29177796226
1998	8945.90027936901
1999	9066.12961969754
2000	9348.26115098245
2001	9478.25424334974
2002	9710.55585048105
2003	9921.74467065833
2004	10144.8238873801
2005	10513.8848584767
2006	10931.7532729885
2007	11570.1015700418
2008	11967.6476995763
2009	12001.6115749312
2010	12459.4512715733
2011	12839.2648643631
2012	13177.3789413655
2013	13451.4778486315
2014	13670.8280028542
2015	13809.6744660101
2016	14079.7833348814
2017	14280.9681823478
2018	14657.4144947975