59% (1980)

71% (1981)

66% (1994)

62% (1997)

62% (2007)

68% (2006)

59% (1991)

64% (1970)

53% (1986)

53% (2005)

49% (1976)

52% (1982)

46% (1980)

20% (1991)

62% (1979)

60% (2013)

65% (2002)

54% (1985)

65% (1983)

75% (1984)