70% (1995)

69% (1992)

25% (2006)

50% (2008)

66% (1994)

74% (1992)

55% (2005)

55% (1985)

40% (1999)

64% (2003)

59% (2003)

75% (1992)

80% (1988)

63% (1987)

60% (1998)

60% (1982)

55% (1996)

50% (1989)

0% (1990)

33% (2001)