Year	constant 2010 US$
1981	1145.93754984033
1982	1068.58900728299
1983	965.601595980803
1984	922.378981030648
1985	894.875488997858
1986	817.032400054437
1987	775.278974922292
1988	792.502616024832
1989	781.117126939003
1990	784.541283269386
1991	805.875039881251
1992	788.417763921633
1993	764.904377982929
1994	753.881230353367
1995	771.306683403424
1996	798.343811567043
1997	808.49227122691
1998	797.652487134703
1999	808.276425329367
2000	825.522562948521
2001	868.519039328257
2002	908.997610130231
2003	940.311319820713
2004	999.494949456747
2005	1026.16385569293
2006	1091.47331194537
2007	1151.81673650087
2008	1097.42919867341
2009	1158.64198633815
2010	1183.92042406203
2011	1171.71203266506
2012	1223.22596640546
2013	1232.69080742167
2014	1270.20801615922
2015	1276.61487917017
2016	1229.32660284617
2017	1212.89030296531