80% (1994)

76% (2001)

77% (1986)

81% (1994)

75% (1996)

63% (2000)

65% (1997)

69% (2008)

63% (1985)

67% (2004)

74% (1999)

40% (1995)

59% (1987)

62% (1990)

60% (1996)

62% (1986)

70% (1990)

69% (1992)

64% (1999)

48% (2009)