72% (1956)

75% (1961)

80% (2006)

95% (2003)

80% (1985)

80% (1986)

60% (1993)

68% (1981)

64% (1974)

70% (2008)

70% (2009)

58% (2014)

47% (1984)

70% (1973)

70% (1998)

70% (2011)

100% (2001)

0% (1991)

0% (2007)

0% (1982)