48% (1976)

52% (1989)

61% (2006)

50% (1978)

66% (1984)

44% (1979)

58% (1982)

69% (1977)

38% (1985)

28% (1996)

67% (1977)

71% (1974)

66% (1979)

45% (1980)

45% (1989)

0% (1974)

57% (1974)

51% (2008)

38% (1989)

59% (1975)