60% (1983)

55% (1975)

75% (1974)

42% (1978)

52% (1982)

70% (1981)

55% (1978)

57% (1977)

58% (1975)

66% (1977)

57% (1974)

31% (1976)

42% (1977)

0% (2001)

60% (1981)

50% (1978)

60% (1975)

40% (1978)

50% (1976)

65% (1979)