Let's not forget, with respect to the health warning printed at the bottom of the billboard:
Literacy:
definition: age 15 and over can read and write
total population: 26.6%
male: 36.9%
female: 16.6% (2003 est.)
(CIA World Factbook — wow, I just noticed that the url for that link ends in "uv.html", dating from the days when Burkina Faso was called Upper Volta.)
