"[At] year-end 2010, 50% percent of consistent 401(k) participants held at least some TDF investments in their 401(k) accounts, and that share increased to 56.4% at year-end 2018.... All age groups increased their exposure to target-date funds. However, the largest net movement toward target-date fund use over the period occurred among consistent 401(k) participants in their 40s, 50s and 60s. Participants in their 20s had the highest use of TDFs in both periods, but experienced the smallest net change."