60% (1981)

59% (1990)

40% (2003)

50% (1985)

66% (1947)

73% (1996)

58% (2006)

51% (2006)

59% (2007)

60% (2010)

56% (1998)

66% (1976)

72% (1977)

59% (1981)

64% (2002)

61% (2005)

55% (2020)

48% (2018)

50% (2019)

60% (2018)