66% (1964)

70% (1995)

79% (1988)

67% (2007)

75% (2013)

58% (2001)

68% (1993)

68% (1970)

62% (1972)

69% (1984)

40% (2010)

53% (2002)

65% (2003)

14% (2007)

57% (2006)

67% (1989)

64% (2006)

83% (2010)

49% (2001)

69% (1983)