67% (2009)

64% (1999)

66% (1999)

69% (2012)

64% (2010)

65% (1997)

62% (2002)

64% (2000)

58% (2000)

56% (1986)

57% (2008)

70% (2000)

60% (2004)

64% (1999)

58% (2012)

56% (1997)

64% (2008)

61% (2002)

65% (1999)

61% (1999)