59% (2006)

42% (2015)

61% (2009)

60% (2014)

65% (2005)

50% (2006)

38% (2005)

55% (2006)

57% (1997)

48% (1992)

51% (2006)

54% (2013)

48% (2010)

55% (2009)

48% (2010)

48% (1996)

51% (2015)

51% (2005)

43% (2001)

58% (2007)