55% (2004)

74% (2007)

56% (2003)

53% (2005)

64% (2001)

60% (1999)

68% (2008)

68% (2004)

46% (2003)

67% (2003)

70% (2007)

57% (1999)

53% (2003)

61% (1997)

46% (2007)

58% (2001)

62% (2002)

56% (2007)

60% (2003)

59% (2007)