Between 1970 and 2000 the US population aged 35 to 44 grew by 43%_英语解答

Between 1970 and 2000 the US population aged 35 to 44 grew by 43%.
请问这里的by是什么意思,有例句最好了,

人气：201 ℃　时间：2020-05-20 05:00:10

解答

表示：增长了
The price/mix increased by 1.8%.
价格综合指数增长了1.8%.
The economy grew by 14% last year.
去年,经济增长14％.