3 1 7 . ▁About ▁ 9 . 7 % ▁of ▁families ▁and ▁ 2 0 . 6 % ▁of ▁the ▁population ▁were ▁below ▁the ▁pover ty ▁line , ▁including ▁ 1 5 . 2 % ▁of ▁those ▁under ▁age ▁ 1 8 ▁and ▁ 6 . 0 % ▁of ▁those ▁age ▁ 6 5 ▁or ▁over . ▁▁ 2 0 1 0 ▁census ▁As ▁of ▁the ▁ 2 0 1 0 ▁U . S . ▁Census , ▁there ▁were ▁ 5 4 , 4 6 2 ▁people , ▁ 2 2 , 2 8 3 ▁households , ▁and ▁ 1 0 , 2 4 0 ▁families ▁res iding ▁in ▁the ▁city . ▁The ▁population ▁density ▁was ▁ 4 0 0 4 . 5 ▁people ▁per ▁square ▁mile ▁( 1 , 5 4 7 . 2 / km ²). ▁There ▁were ▁ 2 3 , 4 2 3 ▁housing ▁units ▁at ▁an ▁average ▁density ▁of ▁ 1 , 7 2 2 . 3 ▁per ▁square ▁mile ▁( 6 6 5 . 4 / km ²). ▁The ▁ra cial ▁make up ▁of ▁the ▁city ▁was ▁ 8 3 . 8 % ▁White , ▁ 7 . 3 % ▁Asian , ▁ 1 . 1 % ▁Black ▁or ▁African ▁American , ▁ 0 . 6 9 % ▁Native ▁American , ▁ 0 . 3 3 % ▁Hawai ian ▁or ▁Pacific ▁Island er , ▁ 2 . 8 % ▁from ▁other ▁races , ▁and ▁ 4 . 0 % ▁from ▁two ▁or ▁more ▁races . ▁