55% (1976)

60% (2007)

59% (1992)

48% (2003)

57% (1983)

45% (2000)

0% (2003)

43% (1994)

63% (1979)

76% (2003)

80% (2007)

58% (2008)

60% (1998)

0% (2006)

55% (1999)

61% (1984)

60% (2002)

55% (1981)

43% (2007)

38% (1987)