68% (2007)

50% (2011)

57% (2021)

65% (1998)

57% (1985)

60% (1977)

81% (1995)

69% (1954)

80% (2001)

50% (1974)

70% (2007)

54% (2010)

55% (1979)

73% (1983)

50% (1974)

62% (2007)

53% (2002)

56% (1996)

73% (1988)

68% (1999)