45% (2004)

55% (1998)

59% (2000)

71% (1994)

75% (1993)

66% (2001)

65% (1990)

54% (2000)

75% (1999)

63% (1996)

59% (1999)

59% (2006)

64% (1998)

70% (2004)

75% (2001)

67% (2001)

66% (2003)

75% (2000)

61% (2000)

45% (2001)