56% (2006)

57% (2007)

36% (2011)

53% (2000)

48% (2005)

47% (2005)

62% (2005)

50% (2002)

55% (2000)

53% (2003)

51% (2006)

50% (2003)

65% (2007)

50% (2005)

52% (2008)

59% (2000)

40% (2001)

47% (2009)

49% (2005)

63% (1997)