time, years since 1990 population 1, thousands population 1, thousands 0 90.0 39 1 76.5 37 2 65.0 35 3 55.3 33 4 47.0 31 5 39.9 29 6 33.9 27 7 28.9 25 8 24.5 23 Unit 1 Lesson 9 Practice Problems 103