57% (2012)

46% (2008)

60% (2009)

54% (2006)

58% (2002)

55% (2013)

52% (2013)

43% (1996)

43% (1994)

40% (2009)

42% (1998)

65% (2007)

53% (1999)

45% (2009)

46% (2005)

44% (1993)

51% (2002)

45% (2000)

57% (1996)

46% (1997)