70% (1995)

68% (1992)

55% (2005)

58% (2003)

60% (1988)

50% (2008)

64% (2003)

66% (1994)

73% (1992)

67% (1987)

55% (1996)

80% (1987)

25% (2006)

54% (1981)

0% (1989)

0% (2001)

33% (2001)

0% (1982)

75% (1992)

0% (1997)