From 1930 to 2000, the population of Broward County, Florida, increased from 20,000 to 1,600,000 (8,000 percent), while Miami-Dade County rose from a population of 130,000 to 2,300,000 (1,800 percent). During the same period, the population of the United States as a whole only rose from 120,000,000 to 280,000,000 (230 percent). Americans are moving disproportionately into hurricane-prone areas.