54% (1976)

50% (2004)

63% (1997)

75% (1966)

68% (1989)

44% (1987)

46% (2004)

72% (2006)

48% (2003)

43% (2005)

57% (1985)

54% (1981)

57% (2003)

49% (2006)

62% (1992)

67% (1987)

44% (2002)

57% (2011)

0% (1990)

0% (1984)