65% (2008)

71% (2001)

56% (2006)

69% (2006)

58% (2004)

60% (1999)

63% (2001)

55% (2003)

73% (2000)

57% (2000)

62% (2000)

72% (2005)

60% (1970)

67% (1995)

55% (1999)

57% (2008)

62% (2000)

0% (1967)

75% (1989)

0% (1987)