73% (2014)

68% (2018)

61% (2014)

67% (1992)

64% (2002)

75% (1976)

67% (1994)

60% (2005)

59% (1994)

59% (1981)

65% (1999)

65% (1978)

61% (1997)

50% (1991)

70% (1993)

59% (1981)

64% (1998)

64% (2003)

56% (1985)

0% (1981)