57% (2018)

47% (2013)

71% (2003)

52% (1986)

59% (1983)

72% (1973)

65% (2015)

73% (1989)

68% (2007)

69% (2008)

65% (1985)

65% (2008)

65% (2017)

63% (2017)

59% (2015)

62% (1985)

63% (1992)

64% (2017)

64% (1976)

55% (2018)