72% (1956)

76% (1961)

80% (1986)

80% (2006)

95% (2003)

60% (1993)

68% (1981)

80% (1985)

58% (2014)

47% (1984)

100% (2001)

64% (1974)

70% (1998)

15% (1966)

70% (2009)

0% (1982)

0% (1991)

0% (2007)

70% (1973)

0% (2005)