Complex sentence: As of the 2000 census, the population was 2,061,162 with an estimated population of 1,985,101 as of July 1,2007, making it the 13th most populous county in the United States.
Split into simpler sentences: As of the 2000 census, the population was 2,061,162. In July 2007, its population was estimated to have reached 1,985,101, making it the 13th most-populous county in the United States.