The 2016 Estimated overall median age will be 35.2 with males coming in at 33.9 and females at 36.1. Residents under the age of 18 will make up 28.32% of population, between the ages of 18-35 will be 21.4%, 35-55 will be 30.74%, and anyone over the age of 55  will make up 19.54% of the residents. Education Est. for residents 25 and over will be. Less than 9th Grade 2.82%, Some High school 4.67%, High school graduate 20.30%, some college 25.21%, associate degree 7.39%, bachelors degree 27.10%, masters degree 10.21%, professional degree 1.05%, doctorate degree 1.25%.. How many percent of the population is over 18?