47% (2009)

73% (1983)

50% (1966)

70% (2010)

40% (2006)

55% (2010)

68% (1997)

50% (1950)

72% (1997)

35% (2004)

56% (1976)

49% (1974)

50% (1957)

50% (1954)

64% (1964)

64% (2008)

58% (1989)

60% (1970)

53% (1989)

45% (1992)