73% (1975)

74% (1975)

77% (1976)

72% (1999)

60% (1986)

59% (1977)

64% (1979)

64% (1977)

62% (1983)

70% (1989)

71% (2007)

50% (1982)

0% (1977)

73% (1977)

67% (2009)

0% (1992)

66% (2006)

68% (1976)

76% (1978)

59% (1994)