81.   A respected annual survey by the University of Michigan showed steady increases in marijuana usage among high school students for five straight years before leveling off last year.

82.   A. Orders from overseas, particularly Europe and the United States, have been recovering since the year before last.

83.   A year in the making, the exhibit will be on display here for a year before traveling around the United States and several foreign countries.

84.   About a year before his death, Manning paid a visit to the Blanton and called Ms. Hite from the galleries.

85.   About a year before the show, artists who were invited to participate went to Kassel to talk about what they would do.

86.   Adding to the worry about Deutsche Telekom, VoiceStream recently surprised investors by announcing that its losses in the second quarter had doubled compared with the year before.

87.   According to the North Carolina Department of Corrections, Peek served less than a year before being paroled.

88.   Adding to the problem, the emergency brakes on many trains had deteriorated in the years before the crash, so they needed still more room to stop.

89.   After being hired, the panelists are trained for six months to a year before being put to work.

90.   After their lands were forcibly incorporated into the Soviet Union, guerrillas fought the Red Army for years before being crushed.