Despite this very significant investment over recent years, demographic factors are contributing to growing waiting lists, particularly for residential services, even though the number of people in receipt of such services, including full-time residential services, continues to increase. The increased birth rate in the 1960s and 1970s has resulted in large numbers of adults in their late 20s and 30s requiring full-time residential services. In addition, people with intellectual disabilities are living longer than previously, adding to the need for services compared to previous generations. This has also been the international experience in service provision to this section of the population.