68% (1976)

62% (1989)

69% (1966)

63% (1975)

72% (1972)

45% (1976)

60% (1991)

62% (1989)

53% (1985)

66% (2001)

60% (1969)

61% (1992)

57% (1994)

60% (1985)

41% (1986)

59% (1978)

51% (1982)

0% (1974)

70% (1994)

20% (1968)