52% (1982)

57% (1976)

60% (1983)

68% (1975)

66% (1977)

50% (1975)

57% (1974)

56% (1975)

58% (1975)

42% (1977)

63% (1977)

50% (1976)

63% (1979)

57% (1977)

61% (1974)

48% (1983)

57% (1990)

57% (1977)

60% (1975)

0% (2001)