68% (1976)

71% (1972)

62% (1989)

62% (1989)

62% (1969)

71% (1966)

62% (1975)

44% (1976)

50% (1982)

61% (1991)

62% (2001)

57% (1978)

40% (1986)

53% (1985)

61% (1992)

0% (1974)

56% (1994)

20% (1968)

60% (1985)