70% (1997)

74% (1999)

62% (1990)

67% (1999)

78% (2006)

0% (2009)

0% (2009)

57% (1985)

80% (2006)

57% (2003)

80% (1981)

82% (1993)

65% (2001)

71% (2005)

82% (1999)

56% (1998)

80% (2004)

70% (1994)

61% (1989)

0% (2001)