Year	Percent
1962	537.11866
1963	424.35052
1964	440.5123
1965	81.85539
1966	83.92418
1967	94.02987
1968	100.71942
1969	105.61435
1970	73.31366
1971	86.54755
1972	70.01461
1973	56.35244
1974	52.1666
1975	44.14374
1976	13.66096
1977	22.94506
1980	78.98445
1981	103.45366
1982	97.07719
1983	72.00322
1984	65.57909
1985	59.56351
1986	113.86332
1987	107.12849
1988	109.415
1989	103.09749
1990	112.27316
1991	182.67717
1992	111.23386
1993	98.14926
1994	102.54248
1995	175.1668
1996	225.30464
1997	193.29117
1998	203.94531
1999	182.57404
2000	147.99256
2001	174.3845
2002	145.23374
2003	149.27079
2004	129.0217
2005	101.9061
2006	101.39266
2007	99.27808
2008	96.22685
2009	95.15701
2010	93.25988
2011	93.76731
2012	100.04633
2013	92.51411
2014	84.19018
2015	75.87141
2016	61.28126
2017	57.6611