52% (2011)

65% (2000)

66% (1986)

45% (1973)

57% (1992)

40% (2003)

52% (1982)

60% (1973)

65% (1971)

60% (2004)

40% (1961)

0% (1973)

50% (2010)

50% (2007)

30% (2005)

80% (1987)

50% (1970)

57% (1988)

70% (1967)

70% (1991)