60% (1999)

63% (1975)

42% (1984)

77% (1986)

68% (1997)

67% (1977)

56% (1997)

62% (1976)

52% (1999)

44% (1974)

47% (1984)

71% (1981)

55% (1987)

61% (1999)

62% (1997)

48% (1977)

53% (1983)

62% (1981)

67% (1972)

67% (1975)