24/7 Wall St: “The U.S. fertility rate is at its lowest point in history, with 62.5 births per 1,000 women between the ages of 15 and 44. The total fertility rate has been below replacement level since 1971. Despite this, the nation’s population is the largest it has ever been. In addition to births, the U.S. population has been growing due to immigration and longer life expectancy. 24/7 Wall St. has determined the number of people alive today who were born each year since 1933. While the fertility rate has declined, the mortality rate has declined as well, increasing the share of Americans who are from a younger generation. Due to increased access to health care, which has improved dramatically over the last century, life expectancy has gone up significantly. The average person born in 1930 lived to 59.7 years of age in. By 2012, the average life expectancy had increased to 78.8 years.