60% (1976)

62% (2014)

45% (1998)

68% (1999)

73% (2011)

55% (1972)

56% (2001)

58% (1976)

70% (1977)

53% (1980)

71% (2001)

53% (2000)

54% (1972)

57% (2008)

45% (1983)

74% (2005)

49% (1996)

55% (1980)

54% (1969)

0% (1980)