Colorado had the nation’s fourth-highest percent change in real GDP — behind Arkansas, Oregon and Washington — in the first quarter of 2016, according to a Bureau of Economic Analysis report released Wednesday. Colorado’s first quarter annualized growth rate of 3 percent outpaced the national average of 1.2 percent. It’s also up from both the state’s 2.8 percent growth in the previous quarter and the 1.2 percent growth posted for the first quarter of 2015. The state’s biggest gains were in real estate, construction and agriculture.