72% (2009)

61% (2010)

69% (1970)

58% (1980)

67% (1976)

72% (1985)

63% (1988)

66% (1999)

75% (2019)

72% (1973)

66% (1971)

73% (1973)

76% (2008)

54% (2018)

69% (2006)

71% (1971)

75% (1993)

66% (1983)

55% (1984)

63% (2011)