59% (1969)

70% (1970)

72% (2000)

59% (1995)

55% (1999)

70% (2012)

66% (1988)

58% (1994)

49% (2007)

68% (1987)

68% (1985)

67% (1978)

53% (2004)

65% (1996)

72% (1971)

61% (1956)

68% (1999)

64% (1954)

75% (1964)

67% (1957)