76% (1967)

67% (1990)

51% (1990)

69% (2001)

63% (2000)

58% (2005)

67% (1992)

41% (1992)

50% (2011)

57% (2000)

62% (1991)

63% (2003)

62% (2001)

45% (1989)

58% (2007)

58% (1991)

50% (1991)

51% (1967)

59% (2001)

55% (1966)