56% (1997)

50% (2009)

70% (1987)

71% (1956)

43% (1979)

78% (1992)

67% (1971)

68% (2001)

77% (2009)

78% (2006)

81% (2011)

44% (1959)

62% (2005)

70% (2006)

50% (2011)

0% (1982)

57% (1997)

88% (1978)

100% (2009)

40% (1995)