71% (1995)

68% (1992)

74% (1992)

55% (2005)

60% (1987)

55% (1996)

25% (2006)

63% (1987)

64% (2003)

60% (1982)

45% (2008)

54% (1981)

80% (1988)

66% (1994)

0% (1993)

55% (1985)

50% (1982)

58% (2003)

33% (2001)

60% (1998)