46% (2004)

53% (2002)

60% (2000)

55% (1998)

55% (1995)

62% (1990)

48% (2004)

55% (2002)

56% (2000)

55% (2004)

75% (1993)

62% (1999)

70% (2003)

69% (2001)

75% (1999)

53% (1999)

69% (1995)

64% (1993)

42% (2000)

46% (2003)