The French Ministry of Culture publishes a very comprehensive survey every 10 years or so. The latest one was in 2008, and the results (in French)
can be found here.
From a quick look at the books section:
30% of the total population has read no book in the last 12 months
27% 1-4 books
12% 5-9
15% 10-19
11% 20-49
5% more than 50
In all, 16% read 20 books or more in the last 12 months (men 13%, women 18%).
59% regularly read a magazine (men 56, women 62)
29% read a paying daily newspaper almost every day (men 32, women 26)