LHASA, Jan. 17 (Xinhua) -- Tibet reported the fastest growth in electricity consumption across China last year as its economy continued to grow at a double-digit rate for a 24th consecutive year. Tibet consumed 4.18 billion kilowatt hours of electricity in 2016, up 21.4 percent, according to an industry report. The region achieved a gross domestic product of 115 billion yuan (17 billion U.S. dollars) in 2016, 11.5 percent up on 2015, according to the local annual legislative meeting held last week. The rate is nearly 5 percentage points higher than the national average. Two electricity transmission lines, one from Qinghai and the other from Sichuan, were put into operation in 2012 and 2014.