60% (1979)

80% (1988)

75% (1976)

75% (1980)

82% (1980)

70% (1977)

84% (1969)

64% (2007)

70% (1979)

72% (1974)

85% (1986)

56% (2011)

70% (1973)

76% (1978)

0% (1975)

78% (1987)

53% (2002)

0% (1985)

0% (2015)

50% (2005)