Year	constant 2010 US$
1988	1085.72553690968
1989	1042.09999683822
1990	1156.73434272331
1991	920.241844749124
1992	947.986972904904
1993	979.50168505229
1994	981.706246728416
1995	990.171505126372
1996	1035.50370468626
1997	1088.02670887505
1998	1186.72728922259
1999	1238.91791917278
2000	1231.76581451943
2001	1235.37725741452
2002	1196.92873832244
2003	1111.09027615839
2004	1235.34073343372
2005	1285.25197275566
2006	1339.2854833766
2007	1379.29958868956
2008	1420.86772999585
2009	1451.66791164091
2010	1510.91623128527
2011	1395.72049481635
2012	1530.97761567783
2013	1553.57234439099
2014	1534.99089020433
2015	1534.10324930436
2016	1578.85147566459
2017	1590.97902770942
2018	1593.28921102177