69% (1987)

81% (1980)

75% (1986)

67% (1993)

61% (1995)

68% (1981)

57% (1989)

62% (2005)

56% (1991)

69% (1982)

71% (1987)

67% (1983)

53% (1986)

0% (1970)

35% (1978)

67% (1982)

58% (1980)

59% (1992)

79% (2011)

65% (1984)