65% (2002)

47% (1977)

64% (1980)

54% (1988)

54% (1981)

63% (1968)

55% (1980)

66% (1974)

71% (1973)

55% (1982)

46% (1986)

51% (1979)

52% (1979)

55% (1987)

57% (1975)

69% (1977)

53% (1980)

51% (1978)

53% (2009)

52% (1979)