NBA players shoot approximately 0.00 % when their shot is blocked. It is just not the best strategy to make a basket. But in 2011-12, the Bucks did not block an extraordinary amount of shots.
In 66 games, the Bucks blocked 335 shots. The league average? 336. They ranked 15th out of 30 teams. Right in the middle. So as you can see, the Bucks did not block an extraordinary amount of shots -- rather, they blocked a very ordinary amount of shots.