11. In 2005, the contract system was introduced into Zimbabwe. 12. At that time, many universities also adopted contract systems . 13. Prisons that used the contract system often made a great deal of revenue from the system. 14. All mines eventually changed to a daily wage, leaving behind the old family-group contract system entirely. 15. Tobacco production recovered after 2008 thanks to the contract system of agriculture and growing Chinese demand. 16. This new contract system had four main features. 17. In addition, reduction semantics have been used to model object-oriented languages, contract systems , and other language features. 18. The threat was clear : If the contract system were put in place, Kokokin would clean house. 19. We can now put together a player contract system for a four-year period from 2002 to 2006, 20. A third land reform beginning in the late 1970s re-introduced the family-based contract system known as the stagnation.