55% (2006)

57% (2007)

47% (2005)

40% (2001)

53% (2000)

50% (2003)

55% (2000)

61% (2005)

48% (2005)

47% (2009)

36% (2011)

50% (2002)

64% (2007)

50% (2005)

53% (2003)

63% (1997)

51% (2006)

59% (2000)

52% (2008)

49% (2005)