55% (1994)

70% (1979)

65% (1985)

53% (1997)

60% (2006)

70% (1972)

58% (1983)

61% (1983)

56% (2004)

61% (1962)

58% (1980)

82% (2005)

52% (1974)

62% (1991)

55% (1980)

69% (1988)

67% (1977)

90% (1999)

57% (2011)

60% (1991)