44% (1999)

50% (2001)

30% (2009)

38% (2005)

50% (1994)

60% (1977)

45% (1997)

53% (1981)

81% (1967)

65% (1955)

0% (1969)

90% (1948)

68% (1952)

50% (2006)

55% (2008)

52% (1981)

100% (2014)

66% (2004)

63% (1996)

70% (2010)