11.   While garbage collection has become more haphazard, some city residents have added to their sanitation problems by raising pigs, chickens, and other animals in their apartments.

12.   But with the economy in decline, and most bank accounts frozen, tax collection has become even more difficult than usual.

13.   But with the economy in decline, and most bank accounts frozen, tax collection has become increasingly difficult in recent weeks.

14.   But with the economy in decline, and most bank accounts frozen, tax collection has become even more difficult than usual in recent weeks.