Year	Percent
1960	129.84573
1961	125.24723
1962	119.90122
1963	112.15444
1964	113.67814
1965	111.35657
1966	124.12379
1967	124.24294
1968	139.92712
1969	145.29993
1970	142.5965
1971	139.98251
1972	127.71161
1973	133.58024
1974	135.75904
1975	127.31351
1976	134.52569
1977	127.62915
1978	135.66088
1979	143.24269
1980	150.08441
1981	154.27586
1982	143.10353
1983	156.69528
1984	175.40607
1985	171.63245
1986	175.34266
1987	196.36102
1988	224.12296
1989	219.50456
1990	217.23478
1991	227.67858
1992	236.80887
1993	229.8994
1994	233.66333
1995	255.74528
1996	239.29666
1997	226.38043
1998	214.12234
1999	214.22337
2000	242.75031
2001	232.03452
2002	246.40734
2003	286.2463
2004	318.41295
2005	326.19856
2006	340.20631
2007	340.04105
2008	348.05057
2009	318.46489
2010	368.295
2011	388.88336
2012	398.42979
2013	419.96232
2014	385.95261
2015	345.85638
2016	331.60873
2017	333.92362