The U.S. industrial sector experienced a banner year in 2015. Vacancy is currently at a low of 6.1 percent nationally and expected to decline further this year, according to real estate services firm Cushman Wakefield, which also pins the national weighted asking rent at $5.44 per sq. ft. Cushman, Colliers International and CBRE all forecast that industrial rents will continue climbing throughout 2016. Nationwide space availability is at a 15-year low with 9.2 percent, CBRE research says.