60% (1972)

55% (1985)

57% (1983)

58% (1983)

72% (1980)

64% (1987)

58% (1971)

54% (1996)

48% (1969)

50% (1976)

59% (1974)

66% (1984)

42% (2007)

48% (1970)

50% (1981)

45% (1988)

48% (1981)

53% (1975)

0% (1985)

0% (1987)