How many people in the country are surnamed Yang?

The national sample survey of 1% population in 2005 shows that the ethnic composition is: among the national population, the Han population is11829,500, accounting for 90.56% of the total population. Yang is the sixth surname in China, accounting for about 3.08% of the Han population in China, and it is widely distributed all over the country, especially in the provinces along the Yangtze River. Yang's population is about 40 million.