11. The observed media replacement rate in large archives is therefore lower than with most other standards. 12. In Colorado, replacement rates are higher but these employees are barred from participating in Social Security. 13. To maintain a stable population size, the necessary replacement rate is 2.1 children per couple. 14. Within 12 months, the acceptable replacement rate will climb to $ 91, 600, he said. 15. Still, this rate is far below the replacement rate of 2.1 2.14. 16. The production capability of the Soviets is reflected in the replacement rate , which rises during the game. 17. That could slow the replacement rate of older DC-9s in AirTran's Atlanta-based fleet. 18. Or consider North America, where the replacement rate hovers around 100 percent, depending on where you look. 19. But when the projected value of 401 ( k ) plan accumulations is considered, income replacement rates soar. 20. In 2007, Belarus's population declined by 0.41 % and its below the replacement rate .