By The Numbers | January 2021 By Naperville Magazine Appears in the January 2021 issue. 83%The percent of Naperville adults who are physically active, compared to the national average of 74 percent. 189.4 millionThe number of flu vaccine doses distributed nationwide for the 2020–21 season, when most states are reporting minimal to low occurrences. 16.8%The percent of Naperville families headed by a single parent, which is well below the national average of 32.1 percent. Out of all small (100,000 to 149,999) U.S. cities, Naperville has the 10th-lowest percentage of single-parent families. 1 in 5The number children with food allergies who have been bullied, according to a new study by doctors at Northwestern University’s Feinberg School of Medicine. Illustration by Kevin Sterjo Share this page: Tweet