Year	% of total
1960	88.07339449541286
1961	96.90721649484534
1962	94.44444444444444
1963	86.5079365079365
1964	87.87878787878789
1965	89.47368421052632
1966	88.60759493670886
1967	91.30434782608697
1968	90.36144578313254
1969	89.6551724137931
1970	90.56603773584906
1971	90.71428571428571
1972	93.16239316239316
1973	93.85665529010238
1974	94.44444444444446
1975	95.23809523809524
1976	90.40590405904058
1977	91.77489177489177
1978	93.5251798561151
1979	90.61488673139158
1980	93.87755102040816
1981	91.07142857142858
1982	90.61371841155234
1983	85.39325842696628
1984	95.78059071729959
1985	97.22222222222221
1986	94.2122186495177
1987	95.72649572649573
1988	94.31818181818181
1989	92.91338582677166
1990	98.06134831460675
1991	100.36
1992	96.25874999999999
1993	94.6086
1994	99.09991735537189
1995	91.0058394160584
1996	98.81305343511451
1997	111.04295774647888
1998	101.91110429447853
1999	106.49670658682635
2000	110.23224242424243
2001	101.00718562874252
2002	106.73589285714287
2003	101.72967741935483
2004	102.89824242424241
2005	94.99888888888889
2006	95.69975609756098
2007	95.9389534883721
2008	99.70943820224718
2009	98.50994082840236
2010	94.71449197860963
2011	86.56799086757991
2012	71.33251824817518
2013	65.83078498293516
2014	70.81518032786884
2015	74.44451807228916
2016	84.84208074534162