75% (1986)

69% (1987)

66% (1993)

81% (1980)

68% (1981)

68% (1983)

71% (1987)

61% (1995)

57% (1989)

56% (1991)

62% (2005)

67% (1982)

69% (1982)

53% (1986)

60% (1992)

57% (1980)

37% (1978)

68% (2015)

79% (2011)

65% (1984)