59% (2005)

65% (2003)

65% (2000)

66% (2004)

67% (2000)

62% (2006)

65% (2007)

69% (2002)

64% (1998)

58% (2006)

65% (1999)

56% (2006)

61% (2006)

60% (2004)

52% (2007)

66% (2007)

70% (1996)

61% (2003)

64% (1994)

45% (2002)