Year	Percent
1961	74.23313
1962	61.19403
1963	60.28037
1964	60.181
1965	60.61947
1966	58.67769
1967	36.85567
1968	19.18679
1969	16.1
1970	15.54307
1971	13.42926
1972	12.07386
1973	9.85832
1974	3.23659
1975	2.78929
1976	2.06943
1977	2.54542
1978	3.24353
1979	3.12524
1980	2.54586
1981	2.47677
1982	2.53315
1983	2.93806
1984	2.921
1985	2.77207
1986	3.42782
1987	3.50936
1988	3.83315
1989	3.24953
1990	2.5863
1991	2.63254
1992	2.33505
1993	2.39612
1994	2.53256
1995	2.77553
1996	2.50413
1997	2.61926
1998	3.207
1999	2.95289
2000	2.24206
2001	2.33439
2002	2.32038
2003	2.20656
2004	1.93687
2005	1.61648
2006	1.40187
2007	1.37737
2008	1.11624
2009	1.47656
2010	1.2473
2011	1.10042
2012	1.01551
2013	1.14227
2014	1.11271
2015	1.72976
2016	1.98532
2017	1.9846
2018	1.84942
2019	1.99472
2020	2.46934
2021	2.12078
2022	1.8408