http://kff.org/global-indicator/yellow-fever-cases/#map
http://kff.org/global-indicator/yellow-fever-cases/#table

Two world maps from yellow fever cases: one from 2000 to 2004 and the other from 2004. Numbers can be seen by passing the mouse on a specific country. It also has a table of these data that can be sorted by country's name or number of cases, the disease's definition and the source of the information.