60% (1976)

75% (1975)

65% (1974)

44% (1980)

51% (1978)

52% (1979)

73% (2002)

47% (1983)

54% (1986)

48% (1977)

59% (1983)

68% (2004)

54% (2009)

57% (1982)

27% (2000)

73% (1981)

45% (1978)

54% (1983)

53% (1979)

72% (1973)