39% (2019)

49% (2015)

46% (2013)

62% (1993)

39% (1983)

51% (1996)

57% (1997)

52% (2018)

40% (1966)

62% (1978)

59% (2011)

65% (1949)

42% (2012)

36% (1985)

50% (1975)

70% (2013)

58% (2007)

40% (2002)

47% (2013)

54% (2017)