Daily Journal of Commerce has the story:

2015 should be record year for apartments... Vacancies are near an all-time low as developers plan to open about 10,000 units this year — and 14,500 next year.... The apartment vacancy rate is near an all-time low and a record number of units are scheduled to open next year, according to a report by Dupre + Scott Apartment Advisors.
Think about that: 14,500 apartments in one year alone. This is more than a trend; this is a major transformation of urban space—how it is organized, how it is built, and how it is lived. We are remaking the city. One can even speculate that the Seattle of tomorrow will have less in common with the Seattle of yesterday, and much more in common with the Seattle at the beginning of the 20th century—the trolley city.