 Surveys of shorelines throughout the Puget Sound region have indicated that 58% are "unstable".Average retreat rates range from one to eight centimeters per year and shores in the Puget Sound area, composed of unconsolidated sediment, erode 10 to 100 times faster than rocky shoreline.As of the census of 2010, there were 22,075 people, 8,677 households, and 5,789 families living in the city.