73% (2014)

68% (2018)

67% (1992)

59% (2005)

75% (1976)

62% (2014)

74% (1990)

64% (2002)

64% (1978)

61% (1997)

64% (1999)

59% (1994)

67% (1994)

58% (1981)

69% (1993)

58% (1981)

50% (1991)

63% (2003)

57% (1985)

0% (1981)