66% (1980)

65% (1980)

61% (1988)

64% (1981)

36% (1983)

54% (1987)

66% (1982)

48% (1986)

30% (1983)

53% (1981)

45% (1981)

0% (1982)

60% (1985)

0% (1983)

20% (1985)

60% (2009)