Why are there the most people in Scorpio in the twelve constellations?

According to the census data of China, what is the population proportion of the twelve constellations in China? Scorpio is tall! ! !

The data comes from the Statistical Yearbook, which is based on the data of China's 2000 population census.

Based on the monthly birth population of China in 2000 1999 1 1 to 1, the population proportion of each constellation is estimated.

There must be a difference between the estimated data and the actual data, but according to the population born every month, the difference between the results and the estimates will not be great.

Let's start with the above picture: