56% (1982)

80% (1980)

54% (1978)

51% (1987)

50% (1981)

30% (1991)

60% (1980)

68% (1981)

71% (1977)

83% (1981)

67% (1980)

20% (1980)

55% (1989)

57% (1982)

68% (1981)

48% (1987)

63% (1987)

73% (1980)

62% (1977)

53% (1982)