60% (1999)

77% (1986)

68% (1997)

63% (1975)

42% (1984)

62% (1976)

52% (1999)

61% (1999)

56% (1997)

55% (1987)

47% (1984)

66% (1977)

67% (1972)

48% (1977)

71% (1981)

63% (1997)

53% (1983)

62% (1981)

56% (1998)

64% (1979)