... trends in 53Graph 5.5. Trends in GNI per capita in selected countries, 19 80 -19 99ZimbabweUgandaSenegalCameroon sub- Saharan Africa US$0200400600800 10 00 19 80 19 82 19 84 19 86 19 88 19 90 19 92 19 94 ... between 15 -25 interviews would be conducted in each54 DEVELOPMENT PLANNING AND HIV/AIDS IN SUB- SAHARAN AFRICA Box 5 .1. Principal planning frameworks and related documents• National Development ... many of whom originated from Chad and from Central Africa, residing in Cameroon was250,000 between 19 85 and 19 90 (Segal, 19 93). In addition, since the beginning of the 19 90sincreasing numbers of...