61% (2016)

58% (2010)

42% (2002)

69% (1991)

62% (1991)

74% (2006)

65% (1977)

72% (1978)

62% (1988)

73% (1967)

68% (1977)

56% (1984)

55% (1976)

66% (1986)

62% (1978)

59% (2018)

37% (2000)

59% (1989)

42% (2011)

60% (2008)