43% (1964)

37% (2001)

63% (1988)

69% (1982)

60% (1985)

56% (1981)

60% (1987)

40% (2003)

75% (1971)

54% (2010)

66% (1993)

60% (2012)

79% (2002)

75% (2013)

73% (2004)

84% (2011)

38% (2004)

77% (2008)

0% (2008)

45% (1987)