"Michael Moore has done well in other countries, but the German sales figures are downright astonishing. In the U.S., Stupid White Men sold about 630,000 copies in its first year of publication. In Germany—a country with less than one-third as many people—the book sold almost double that, 1.1 million copies. The book has sat at #1 on the Spiegel bestseller list for eight consecutive months. Even the English version made the lists, the only book besides Harry Potter ever to do so."
A graph in the print version of PW points out that when you contrast the high German sales to the (relative to the US) low German population, you get one copy of Stupid White Men for every 80 Germans, vs. 1 copy for every 375 Americans.
This is what happens after too many Gunter Grass novels, I guess.