84% (1999)

75% (1997)

73% (1986)

71% (1998)

58% (2000)

73% (2003)

69% (2015)

69% (1998)

61% (2000)

64% (1999)

59% (1999)

67% (2000)

70% (1970)

65% (2012)

68% (1969)

62% (1992)

68% (1970)

58% (1994)

63% (1977)

61% (2001)