An arrow chart showing the decrease in the share of the population under age five, 2005 to 2024. Nationally, the share of the population under five decreased 1.6 percentage points, from 7.0% in 2005 to 5.4% in 2024. The metro area with the largest decrease is Salt Lake City, which dropped 3.3 percentage points from 9.2% to 5.9%.