68% (1977)

73% (1995)

30% (2002)

67% (1992)

76% (2000)

70% (2012)

87% (2003)

76% (2000)

63% (2001)

45% (2000)

77% (2001)

40% (1997)

59% (2000)

40% (1999)

60% (2000)

48% (1999)

60% (2007)

63% (2003)

53% (2000)

90% (2002)