45% (2004)

53% (2002)

59% (2000)

55% (1998)

62% (1999)

55% (2000)

55% (2002)

75% (1993)

49% (2006)

54% (1995)

54% (2004)

66% (1997)

75% (2000)

69% (2001)

68% (1997)

48% (2004)

61% (1990)

69% (1995)

71% (1996)

42% (2000)