62% (1999)

59% (2005)

66% (1989)

68% (1959)

64% (1970)

66% (1968)

58% (1969)

83% (2005)

62% (1958)

61% (1952)

30% (1964)

55% (1958)

40% (1966)

80% (1961)

35% (1965)

57% (1963)

40% (1953)

60% (1950)

90% (1986)

79% (1964)