Year	Percent
1970	84.28875
1971	95.0933
1972	103.89262
1974	99.43609
1975	98.52489
1976	102.76923
1977	97.97918
1978	102.54854
1980	97.96772
1981	91.92285
1982	93.50334
1983	102.37805
1984	96.07843
1985	94.49257
1986	111.1596
1987	102.29671
1988	88.26406
1989	90.55589
1991	101.59953
1992	97.71772
1993	97.14112
1994	95.80764
1997	101.61491
1998	98.38107
1999	100
2000	98.81398
2001	105.65438
2002	106.19355
2003	107.05421
2004	103.64721
2005	115.02732
2007	112.16216
2008	112.15429
2009	106.41312
2010	110.51829
2011	112.84476
2012	109.74817
2013	112.42702
2014	122.56149
2015	122.22222
2016	126.51888