85% (1994)

83% (2009)

80% (2003)

79% (2004)

71% (1996)

74% (1997)

59% (1995)

80% (2011)

82% (2005)

46% (1999)

50% (2000)

59% (1996)

51% (1995)

69% (2009)

61% (2002)

77% (1998)