56% (1981)

64% (1988)

63% (1982)

75% (1971)

37% (2001)

43% (1964)

61% (1985)

66% (1993)

54% (2010)

73% (2004)

38% (2004)

62% (1998)

0% (1974)

60% (1987)

87% (2007)

77% (2008)

40% (1987)

78% (2002)

74% (2013)

85% (2011)