66% (2009)

54% (1992)

62% (2000)

64% (1997)

67% (1977)

55% (1985)

63% (2006)

67% (1991)

52% (1994)

10% (1989)

57% (2005)

67% (1977)

66% (2009)

60% (1998)

61% (2007)

43% (1994)

0% (1998)

56% (1982)

0% (2003)

69% (2005)