75% (1978)

60% (1986)

66% (2001)

61% (2021)

58% (2008)

51% (1993)

63% (1995)

61% (1997)

65% (2009)

67% (1971)

62% (2021)

50% (2023)

70% (2010)

69% (1999)

73% (1952)

61% (1999)

54% (2011)

78% (2012)

77% (2023)

49% (2023)