65% (2003)

53% (2004)

72% (1992)

71% (1991)

67% (1997)

71% (2003)

61% (2004)

72% (1993)

59% (1991)

60% (2001)

76% (2004)

56% (1994)

59% (1996)

72% (2004)

63% (2000)

55% (1998)

65% (2000)

67% (1991)

65% (1994)

54% (1996)