Fivethirtyeight.com, using data from Current Population Survey, looked at four age groups: 18-29, 30-44, 45-64, and age 65 and older. Typically, mid-term elections (elections that are held in between presidential election cycles) have lower turnout rates than presidential election cycles. The average midterm turnout for all eligible voters since 1998 has been between 40 and 45 percent. For presidential elections, the turnout is usually between 55 and 60 percent. For example, in 2016, our last presidential election, turnout was about 58 percent.