62% (1979)

38% (1987)

57% (2005)

48% (2003)

67% (1977)

76% (2003)

61% (1979)

50% (2001)

58% (2007)

66% (1995)

55% (1999)

0% (2003)

55% (1977)

69% (1995)

69% (2005)

53% (1981)

56% (1982)

55% (1979)

32% (1990)

55% (2006)