Question 5 to 8 are based on the following description:There were 100,000 people in a certain area. The total number of deaths in 1960 was 1,000. There were 300 tuberculosis (TB) patients identified, including 200 men and 100 women. In 1960, 60 people died of TB, including 50 men.5.The mortality rate in this area in 1960 was ()