literacy

[Frans Plank]

Dear literate lingtypists,

were you aware that today is UNESCO's International Literacy Day?  (http://www.unesco.org/new/en/education/themes/education-building-blocks/literacy/advocacy/international-literacy-day/ 
)

They complain that 793 million adults worldwide lack minimum literacy  
skills:  one in 6 adults is still not literate.

Does anybody know how they count the speakers of non-written  
languages?  Does 'illiterate' in UNESCO speak also include these?

Are there reliable figures of the numbers of non-written languages and  
their speakers?  I'm asking because I tend to mention this sort of  
thing in teaching.  Perhaps typologists should be aware of this, too.

yours
Frans