53% (1980)

53% (1980)

60% (1976)

42% (1987)

57% (1981)

45% (2008)

52% (1979)

53% (1978)

53% (1977)

57% (1979)

53% (1979)

32% (1989)

47% (1978)

61% (1980)

60% (1975)

53% (1998)

41% (1974)

49% (1979)

55% (1984)

52% (1987)