Year	Measure
1971	54.74026
1972	55.84212
1973	60.82697
1974	61.58075
1975	64.14937
1976	66.54696
1977	68.18759
1978	69.69649
1979	73.30193
1980	80.43762
1981	67.55772
1982	100.96377
1983	96.05981
1984	144.09138
1985	109.03434
1986	170.01471
1987	173.39915
1988	162.24299
1989	164.20997
1990	168.00132
1991	178.64463
1992	171.51494
1993	155.18177
1994	139.57775
1995	146.46754
1996	149.3459
1997	124.89578
1998	107.26752
1999	66.95694
2000	92.69228
2001	101.63441
2002	112.11618
2003	111.63394
2004	102.62273
2005	114.3013
2006	122.58075
2007	122.22584
2008	131.94231
2009	141.05327
2010	136.54933
2011	143.81538
2012	208.91953
2013	207.30763
2014	197.28599