68% (1976)

72% (1972)

65% (1975)

69% (1966)

63% (1989)

62% (1989)

61% (1969)

61% (1991)

51% (1982)

61% (1992)

66% (2001)

58% (1978)

45% (1976)

57% (1994)

0% (1974)

53% (1985)

42% (2004)

41% (1986)

20% (1968)

60% (1985)