77% (1969)

71% (1979)

63% (1981)

70% (1982)

61% (1984)

77% (1979)

71% (1996)

73% (1980)

71% (1994)

65% (1995)

67% (1994)

67% (1982)

0% (1994)

68% (1978)

63% (1980)

72% (1977)

62% (1977)

72% (1979)

76% (1980)

65% (2000)