Year	Measure
1971	1380.9214
1972	1379.81892
1973	1411.49678
1974	1415.68295
1975	1378.54699
1976	1404.74478
1977	1420.56776
1978	1426.91926
1979	1484.56582
1980	1487.61708
1981	1430.44008
1982	1416.54002
1983	1419.93017
1984	1447.81983
1985	1360.66541
1986	1421.54698
1987	1477.04343
1988	1504.81909
1989	1441.48227
1990	1407.38675
1991	1430.51498
1992	1483.77944
1993	1468.22078
1994	1541.65752
1995	1544.35577
1996	1582.1382
1997	1613.91899
1998	1650.34373
1999	1659.99283
2000	1661.11704
2001	1562.68636
2002	1502.03719
2003	1589.54508
2004	1717.65052
2005	1709.57235
2006	1840.44044
2007	1845.09812
2008	1923.13981
2009	1850.86153
2010	1908.28056
2011	1933.52303
2012	1920.08096
2013	1951.43945
2014	2015.18704