Year	constant 2010 US$
1991	945.84480153304
1992	840.18103448167
1993	760.976918005171
1994	645.298470292691
1995	558.864834230121
1996	643.827092582819
1997	694.576640114852
1998	698.280275324074
1999	686.345540785808
2000	674.099709096873
2001	713.795847352206
2002	817.06696547631
2003	913.317830134047
2004	1019.99391354513
2005	943.921154431852
2006	990.688100536788
2007	1050.24428548555
2008	1071.62541025639
2009	1181.48766214786
2010	1163.025012548
2011	1197.94563220219
2012	1253.88799629092
2013	1231.26407149992
2014	1208.96095591405
2015	1354.79684710458
2016	1516.78202957162
2017	1529.01385779041
2018	1559.39776780277