Year	constant 2010 US$
1991	4143.02655384746
1992	4091.85204716554
1993	4022.72604329389
1994	4073.45090637145
1995	4171.61034123511
1996	4197.64025437238
1997	4167.50432655036
1998	4236.30442979683
1999	4434.94661253478
2000	4552.90843968523
2001	4264.17243649078
2002	4745.79335324087
2003	4518.05881449545
2004	4684.77010271748
2005	4723.9498031136
2006	5067.72951980402
2007	5532.61386719281
2008	5373.12990066343
2009	5000.26580101486
2010	4864.45932030206
2011	4926.69724027559
2012	4994.53468887457
2013	5524.57375566921
2014	5683.86160394777
2015	5857.34474672614
2016	5957.97608044234
2017	6003.39809626495
2018	6072.3066814551