6.28. Persons with disabilities constitute a significant proportion of the population. The implementation of the World Programme of Action concerning Disabled Persons (1983-1992) contributed towards increased awareness and expanded knowledge of disability issues, increased the role played by persons with disabilities and by concerned organizations, and contributed towards the improvement and expansion of disability legislation. However, there remains a pressing need for continued action to promote effective measures for the prevention of disability, for rehabilitation and for the realization of the goals of full participation and equality for persons with disabilities. In its resolution 47/88 of 16 December 1992, the General Assembly encouraged the consideration by, inter alia, the International Conference on Population and Development of disability issues relevant to the subject-matter of the Conference.