Post-1994 growth came from global recovery, not the devaluation itself.

Evidence

After 1994, most African countries returned to growth. However, the main cause of this recovery was not the devaluation, even though it played an important role. This occurred in a context of global economic recovery, rising commodity prices and good weather conditions. — Fanny Pigeaud_ Ndongo Samba Sylla, Africa’s Last Colonial Currency, 216