71% (1976)

64% (2001)

75% (2014)

48% (1980)

57% (2009)

44% (1977)

56% (2006)

57% (1994)

60% (1986)

50% (1987)

48% (1979)

70% (1984)

50% (1965)

0% (2005)

100% (1996)

65% (1987)