60% (1967)

54% (1994)

50% (1986)

57% (1974)

75% (1973)

67% (1969)

67% (1972)

60% (1976)

73% (1975)

35% (1980)

65% (1970)

0% (1976)

0% (1973)

42% (1987)

61% (1994)

30% (2006)

80% (1974)

50% (1983)

0% (1975)

53% (1975)