50% (2001)

65% (1977)

58% (1989)

76% (2003)

55% (1976)

55% (1999)

69% (1995)

0% (1995)

60% (1985)

0% (2003)

61% (2000)

61% (1984)

57% (1983)

60% (2007)

43% (2007)

60% (1981)

61% (2007)

60% (1985)

55% (1977)

73% (2008)