56% (2006)

57% (2007)

50% (2002)

53% (2000)

62% (2005)

51% (2006)

53% (2003)

64% (2007)

47% (2005)

55% (2000)

48% (2005)

50% (2005)

51% (2003)

36% (2011)

58% (2000)

39% (2001)

48% (2005)

47% (2009)

52% (2008)

63% (1997)