64% (2003)

0% (2008)

50% (1975)

36% (1977)

57% (1978)

50% (1980)

52% (1969)

56% (1998)

64% (1969)

58% (1964)

52% (1961)

69% (1949)

0% (2001)

52% (1982)

57% (2009)

53% (2006)

67% (1986)

67% (2015)

44% (1991)

68% (1971)