62% (1983)

73% (1982)

56% (1999)

55% (1980)

58% (1995)

65% (1982)

72% (1989)

65% (1987)

61% (1986)

60% (1996)

72% (1976)

75% (1980)

72% (1966)

58% (1982)

47% (1995)

63% (1976)

65% (1990)

70% (1973)

58% (1978)

57% (1979)