52% (1997)

54% (1994)

65% (1987)

70% (1956)

50% (1985)

50% (1973)

43% (2005)

60% (1966)

52% (1977)

69% (1983)

60% (1996)

50% (1983)

55% (1979)

55% (1999)

50% (1999)

40% (2002)

43% (1988)

58% (1979)

70% (1958)

50% (1977)