The line graph illustrated the people lived in the city from 1970 to 2020.
Generally, the population reached to the peak in 2010. There was big gap between 1970 and 2020.
In 1970, the population in the city was over 2 million people, then in 1980 the figure didn’t change a lot. By 1990, the gap was bigger, from over 2 million to 2,5 million people. After that, the population continued to escalate and in 2010 the figure ascended to an all-time high and climbed up the peak. Unfortunately, the diminution appeared, which made the figure plummeted more than 300 thousand people.
Between 1970 and 2010, this was the biggest gap. The figure rapidly bounced and rocketed near 3 million. This figure demonstrated about the number of younger higher than the number of older a lot, so it reminded this city should have a method of the percentage of population.
