This volume presents an overall picture of enrollment trends in Canada, with breakdowns in terms of students' gender, age, type of study (part time, full-time, lifelong learning opportunities), level of degree (bachelor's, master's, PhD) and type of student (domestic, international, Aboriginal, visible minorities). Following this is a discussion of the factors that are currently driving change in enrollment levels and participation rates and that will drive change for the foreseeable future. Demography is examined first, as it is clear that demographics have played and will continue to play an important role in any projection of enrollment growth. The discussion presents an overall national view, as well as a provincial breakdown, since there will be very significant differences in population trends between and within provinces. Then, a comprehensive analysis of the factors that can influence participation rates--a measure that can have sustained impact on enrollment in spite of certain population shifts--is provided. This report suggests that the factors that drive increased participation rates are likely to drive enrollment demand over the coming years. (Contains 51 figures.) [For "Volume 2: Faculty," see ED501852. For "Volume 3: Finance," see ED501770.]