2. According to the main data bulletin of the 6th National Population Census in 2010, the total population within China's territory was 1,339,724,852 people. Compared to the 5th National Population Census in 2000, it increased by 73.9 million people over 10 years. The average annual growth rate over these 10 years is (accurate to 0.00001).
2. $0.569 \%$