70% (1995)

69% (1992)

64% (2003)

59% (2003)

55% (2005)

25% (2006)

50% (2008)

66% (1994)

0% (1997)

50% (1989)

60% (1987)

0% (1984)

63% (1987)

33% (2001)

55% (1996)

60% (1982)

50% (1982)

74% (1992)

54% (1981)

0% (1985)