Year	Percent
1960	79.79187
1961	83.18794
1962	104.2417
1963	94.39164
1964	108.25422
1965	104.68427
1966	107.99335
1967	108.80213
1968	100.06477
1969	101.31554
1970	112.65872
1971	110.96696
1972	114.91505
1973	133.60267
1974	141.28616
1975	125.53041
1976	143.9643
1977	135.36191
1978	137.33192
1979	128.24483
1980	131.50636
1981	115.53258
1982	102.43848
1983	102.14059
1984	96.05431
1985	84.57692
1986	79.78935
1987	70.92928
1988	64.33593
1989	137.98805
1990	374.08949
1991	210.05747
1992	431.76734
1993	529.92519
1994	573.37368
1995	986.64688
1996	743.4128
1997	351.47009
1998	248.88765
1999	223.85695
2000	188.4458
2001	68.4453
2002	65.24862
2003	66.97115
2004	92.81652
2005	80.21818
2006	103.38909
2007	94.66499
2008	124.20585
2009	60.58361
2010	72.08185
2011	91.32263
2012	84.36762
2013	87.79861
2014	121.2618
2015	96.87807
2016	75.25464
2017	69.49027