China is home to one-fifth of the world’s population. With 1.295 billion people in 2000, it ranks as the most populated country in the world. About 64% of China's population lives in rural areas; 23% are under 14 years of age, and 70% between 14 and 65 years old. The predominantly rural population helps to explain the low penetration rates of computer ownership and Internet users in China. In addition, China is culturally and ethnically diverse with more than 50 different ethnic groups. Its provinces often have more people than most European countries. This diversity and the centralized political structure make maintaining state authority both a priority and a challenge. The Internet is viewed as a potential tool that can either strengthen or weaken the government's political and economic control.