74% (1981)

63% (1982)

67% (1970)

70% (1980)

70% (1967)

65% (1964)

62% (1968)

63% (1981)

70% (1965)

54% (1982)

63% (1965)

57% (1969)

58% (1980)

65% (1971)

67% (1964)

62% (1975)

53% (1980)

51% (1980)

62% (1963)

73% (1971)