5m IDPs in Sudan, including 1.8m from Darfur

I wonder how many of these were nomads:

More than one year after the signing of a Comprehensive Peace Agreement (CPA) which ended 21 years of civil war between the central government and the southern-based Sudan People's Liberation Movement/Army, there are still an estimated five million internally displaced people in Sudan, including 1.8 million from the separate conflict in the western Darfur region

Source: Internal Displacement Centre - Sudan: Slow IDP return to south while Darfur crisis continues unabated 17 Aug 2006. (via ReliefWeb)