55% (1961)

43% (1980)

69% (2007)

64% (2003)

45% (2002)

60% (2006)

61% (1981)

53% (1986)

74% (2017)

54% (2016)

52% (2006)

66% (1993)

69% (2001)

54% (2017)

49% (1990)

56% (1997)

47% (2018)

88% (1977)

75% (1958)

62% (2000)