65% (1970)

57% (2001)

68% (1978)

54% (1987)

66% (1979)

48% (2005)

58% (1998)

62% (1970)

57% (1983)

50% (1978)

59% (1971)

0% (1998)

70% (1977)

66% (2010)

65% (1971)

53% (1993)

58% (2008)

50% (1992)

65% (1985)

71% (1981)