57% (2001)

50% (1975)

65% (1971)

55% (1972)

50% (1978)

63% (1979)

55% (1996)

80% (1972)

66% (1976)

51% (1973)

39% (2003)

57% (2001)

38% (1998)

58% (2008)

70% (1969)

49% (2005)

74% (1975)

53% (1997)

76% (1988)

0% (1970)