By 1998, the figure in both places had risen, to 40 per cent in B.C., according to the McCreary study, and 37 per cent in the U.S., according to the " Monitoring the Future" longitudinal observation that is carried on there.
En 1998, le taux de consommation se situait à 40 p. 100 en Colombie-Britannique, d'après l'étude McCreary, et à 37 p. 100 aux États-Unis, selon l'étude longitudinale intitulée «Monitoring the Future».