41% (1983)

32% (1989)

44% (1980)

41% (1978)

42% (1986)

40% (1980)

46% (1980)

49% (1977)

45% (1973)

44% (1989)

51% (1976)

34% (1981)

31% (1982)

43% (1981)

37% (1983)

37% (1978)

46% (1975)

60% (2013)

30% (1974)

32% (1981)