Bruce Stokes has written a report entitled "Filling the Family Planning Gap" which is the guide to popularity of methods of family planning. Voluntary sterilization is now chosen by more people than any other method of birth control. 70 million couples use sterilization as a preferred method while 55 million use the pill, 30 million use the condom, 15 million use the IUD, and 65 million use other methods. The use of the pill is on the rise on all continents, the condom is most popular in Japan, and well-educated women in the U.S. prefer the diaphragm. In China each couple is entitled to 2 or 3 children only, and late marriages are encouraged. Small groups in factories, neighborhoods, and villages decide who should have children and when. In Indonesia headmen in villages support the family planning program, and 27,000 village pill and condom depots have been established in Java and Bali. Mothers' clubs are popular in Indonesia and in South Korea. Stokes says that the most successful family planning programs have been decentralized. "Each country must find its own path, design programmes that are sensitive to the cultural, political and economic realities it faces."