45% (2004)

53% (2002)

60% (2000)

55% (2000)

55% (1998)

64% (1998)

62% (1999)

55% (2002)

75% (1999)

42% (2000)

75% (1993)

67% (1997)

55% (2004)

50% (2006)

62% (1990)

65% (1996)

49% (2001)

48% (2004)

69% (2001)

72% (2003)