Year	constant 2010 US$
1991	6230.08705537467
1992	5587.61295811576
1993	4146.56086730058
1994	4812.20676453033
1995	5822.098166754
1996	3927.64616992826
1997	5714.74004626541
1998	6120.19795371408
1999	7155.55136194773
2000	7015.99340359258
2001	9835.1836114273
2002	9401.49792822735
2003	8578.13422726044
2004	8924.97784604816
2005	9774.14716931068
2006	10260.6769714986
2007	7717.07802917563
2008	9965.33553546968
2009	9883.97613915196
2010	10074.7437063126
2011	10563.0324928684
2012	10383.0285654007
2013	10371.6220407442
2014	10177.4614105785
2015	9525.96759219692
2016	10226.428086266
2017	10266.150999407
2018	10269.8668293482