https://www.scribd.com/document/367686924/2017-Tre...
You can look at the slides from last year's multifamily market update, but there's a lot of context missing without the presenters narrative to explain the data presented.
I have no idea where CoStar gets its data, but my only guess is that the numbers are skewed by added units coming to market? I'm looking forward to next month's report, but last year occupancy rates were near 98% for the market. At some point a surge of vacancy seems logical as more of the displaced homeowners resettle into their homes and the new inventory keeps getting added.
The wildcard of it all is, how much new demand that will fill the vacancies at rates based on projected population growth. If the projections prove right and the new units match the demand, occupancy rates won't be bad. But if there's way more units available, than there is demand, that could be a big negative. Only time will tell!