58% (1997)

64% (1992)

75% (1999)

60% (1988)

65% (1992)

60% (1996)

82% (2013)

54% (1992)

69% (2009)

90% (1989)

67% (2009)

74% (2009)

81% (2002)

78% (1993)

69% (2006)

70% (1984)

75% (1983)

61% (1999)

66% (1990)

90% (1993)