70% (2012)

64% (1999)

64% (2000)

56% (1986)

67% (2009)

65% (2008)

56% (1997)

60% (2004)

64% (2010)

70% (2000)

54% (1998)

58% (2000)

66% (1999)

58% (2003)

62% (2002)

57% (2008)

65% (1997)

59% (2008)

61% (2000)

58% (2012)