Year	constant 2010 US$
1980	3175.29501115474
1981	3336.85144288871
1982	3410.77779278581
1983	3530.68436762425
1984	3651.68921084193
1985	3744.33752315914
1986	3892.619603644
1987	4102.7569902844
1988	4515.88162098306
1989	4375.91047053709
1990	3811.39341867232
1991	3464.72256142283
1992	3552.84826867063
1993	3526.02084999923
1994	3595.46792422048
1995	3700.64023345325
1996	3716.94555047679
1997	3705.69805498397
1998	4010.79140516763
1999	3710.80291762651
2000	3866.72235520568
2001	4193.68968087103
2002	4620.71720664416
2003	4877.74211465442
2004	5209.62404010852
2005	5575.87081237093
2006	5845.98670633849
2007	6016.79676218835
2008	6627.35443656531
2009	6584.31258258789
2010	6700.70560759286
2011	6793.83424870744
2012	6966.88321927506
2013	6978.61013595017
2014	7245.46873672261
2015	7455.50132920458
2016	7945.31151755994
2017	8445.21330819965
2018	8790.53856169447