Complex sentence: In 1997 it was estimated that annual production of pizza cheese was 2 billion pounds in the United States and 200 million pounds in Europe, and in 2000 demand for pizza cheese in Europe was increasing by 8% per year.
Split into simpler sentences: In 1997 it was estimated that annual production of pizza cheese was 2 billion pounds in the United States and 200 million pounds in Europe. It was stated in 2000 that demand for pizza cheese in Europe was increasing by 8% per year.