69% (1992)

70% (1995)

64% (2003)

59% (2003)

50% (2008)

55% (2005)

55% (1985)

63% (1987)

25% (2006)

50% (1989)

74% (1992)

66% (1994)

33% (2001)

60% (1988)

60% (1982)

54% (1981)

80% (1989)

86% (1985)

40% (1999)

60% (1987)