68% (1992)

71% (1995)

60% (1987)

64% (2003)

55% (2005)

55% (1985)

74% (1992)

55% (1996)

25% (2006)

50% (1989)

58% (2003)

54% (1981)

66% (1994)

60% (1982)

0% (1987)

60% (1988)

45% (2008)

80% (1988)

75% (1992)

0% (1990)