73% (2014)

68% (2018)

74% (1990)

61% (2014)

59% (1994)

75% (1976)

65% (1978)

63% (2002)

59% (1981)

61% (1997)

66% (1994)

69% (1993)

67% (1992)

50% (1991)

63% (2003)

60% (2005)

64% (1999)

59% (1981)

56% (1985)

60% (1980)