63% (2004)

71% (1999)

69% (1999)

62% (2006)

66% (1997)

57% (1999)

72% (1998)

69% (1999)

69% (2001)

76% (2002)

64% (1998)

67% (1998)

63% (2001)

62% (2003)

63% (1997)

66% (1991)

66% (1996)

60% (2006)

45% (2011)

53% (2002)