75% (2007)

100% (2008)

74% (1975)

100% (1998)

60% (1957)

40% (1981)

61% (2012)

60% (2014)

40% (1999)

63% (2014)

50% (1995)

60% (1952)

55% (1950)

63% (2001)

73% (1985)

80% (2005)

61% (1970)

68% (1993)

71% (1987)

50% (2011)