70% (2007)

0% (1990)

78% (1964)

70% (2009)

61% (2010)

61% (2004)

67% (1997)

46% (2009)

64% (2003)

60% (1961)

52% (2002)

66% (1989)

71% (1986)

70% (1989)

70% (1986)

0% (1991)

80% (1994)

72% (1993)

50% (1956)

65% (1985)