71% (1995)

68% (1992)

50% (2008)

55% (2005)

55% (1985)

74% (1992)

66% (1994)

60% (2003)

33% (2001)

63% (1987)

25% (2006)

0% (1997)

80% (1988)

86% (1985)

55% (1996)

60% (1991)

50% (1989)

0% (1984)

60% (1982)

60% (1987)