46% (2004)

60% (2000)

72% (1994)

55% (1995)

55% (1998)

75% (1993)

62% (1990)

69% (2001)

66% (1997)

71% (2003)

75% (1999)

46% (2003)

65% (1996)

78% (2001)

60% (2006)

67% (1997)

68% (1996)

60% (1999)

49% (2001)

70% (2004)