Year	% of total
1960	89.82300884955751
1961	88.73873873873875
1962	88.73873873873875
1963	88.93617021276596
1964	88.8888888888889
1965	94.58874458874459
1966	94.45628997867803
1967	87.95811518324608
1968	222.72727272727272
1969	79.10447761194031
1970	90.75630252100841
1971	91.0569105691057
1972	88.41309823677582
1973	90.54373522458629
1974	91.08910891089108
1975	93.03977272727273
1976	89.25619834710744
1977	92.64705882352939
1978	93.16596931659693
1979	93.42604298356511
1980	94.20131291028446
1981	94.32703003337042
1982	94.11764705882352
1983	92.47910863509749
1984	94.23503325942349
1985	92.46575342465754
1986	93.11294765840219
1987	92.37668161434979
1988	92.37967914438502
1989	94.44444444444446
1990	126.06296137339055
1991	135.97802575107295
1992	123.56505836575874
1993	130.98524
1994	134.87816091954022
1995	110.80717391304347
1996	111.01122866894198
1997	86.93417445482866
1998	80.36841666666666
1999	80.56287878787879
2000	80.56561576354679
2001	80.01476404494382
2002	74.46091703056769
2003	85.26387527839644
2004	67.62519480519481
2005	72.43456790123457
2006	50.69281867145422
2007	46.42895161290323
2008	45.894796875
2009	34.464285714285715
2010	71.04486486486486
2011	66.75199471598415
2012	63.01734584450402
2013	61.62024968789014
2014	66.87889148191366
2015	73.97224137931035
2016	68.86714717741935