64% (2008)

68% (1999)

66% (2005)

68% (2006)

66% (2005)

52% (2012)

60% (1964)

49% (2006)

60% (1971)

65% (2003)

50% (1987)

44% (1972)

58% (1996)

20% (1994)

60% (1984)

80% (1970)

67% (1977)

57% (2007)

60% (1990)

0% (2001)