Year	Measure
1971	77.97546
1972	82.42858
1973	85.15663
1974	87.47772
1975	90.45997
1976	96.52272
1977	98.15331
1978	101.17355
1979	104.70635
1980	104.92354
1981	108.74661
1982	107.29278
1983	106.69208
1984	108.30227
1985	113.42804
1986	116.20018
1987	125.24079
1988	118.64787
1989	121.63643
1990	125.20026
1991	126.59433
1992	126.54246
1993	129.02793
1994	126.41022
1995	127.62166
1996	129.85059
1997	127.40849
1998	128.08281
1999	118.46252
2000	106.1033
2001	115.74346
2002	114.9515
2003	120.5947
2004	127.8691
2005	130.21423
2006	138.04904
2007	141.70595
2008	141.15514
2009	142.10729
2010	150.27756
2011	151.12915
2012	152.84113
2013	163.47346
2014	166.73819