Year	Measure
1991	1049.98158
1992	1007.45117
1993	1073.08862
1994	946.02787
1995	937.56098
1996	1008.50342
1997	956.22839
1998	1038.90165
1999	1097.92997
2000	994.07295
2001	1028.13618
2002	1063.63081
2003	1106.44917
2004	1380.13207
2005	1451.13956
2006	1540.56896
2007	1549.58256
2008	1589.93532
2009	1541.85228
2010	1546.58862
2011	1567.9577
2012	1610.02927
2013	1631.75798
2014	1584.56882