Year	Measure
1971	119.36725
1972	137.50581
1973	144.97431
1974	122.35378
1975	161.80355
1976	192.90176
1977	203.67996
1978	208.25203
1979	214.603
1980	251.80344
1981	211.88007
1982	184.98151
1983	159.54182
1984	164.2443
1985	172.93563
1986	144.21817
1987	165.06334
1988	162.84849
1989	186.50975
1990	200.45741
1991	206.46887
1992	256.47512
1993	243.09034
1994	266.40984
1995	295.62408
1996	259.23589
1997	240.54813
1998	314.63598
1999	363.12692
2000	330.45103
2001	357.98904
2002	363.01541
2003	450.78276
2004	482.5378
2005	480.6801
2006	533.02946
2007	543.4923
2008	530.54447
2009	537.78207
2010	541.95311
2011	534.5537
2012	532.64162
2013	558.40475
2014	577.88589