61% (1981)

47% (1967)

28% (1960)

75% (1955)

30% (1994)

78% (1962)

55% (1980)

70% (1958)

68% (2001)

64% (1959)

50% (1979)

66% (1986)

65% (1979)

71% (2005)

71% (2015)

0% (1954)

50% (1959)

0% (1961)

42% (1987)

0% (1995)