66% (2009)

54% (1992)

73% (1975)

59% (2007)

62% (2000)

64% (1997)

66% (1992)

63% (2006)

67% (2008)

67% (1977)

52% (1994)

67% (1991)

61% (2003)

55% (1985)

70% (1981)

57% (2005)

58% (2002)

60% (1982)

0% (2003)

69% (2005)