With a growth rate of 2.0 percent, Colorado shares the designation as the third-fastest-growing state in the nation, according to estimates released Monday by the U.S. Census Bureau. Two of the state's Four Corners neighbors led the nation in growth, with Utah pegging a 2.5-percent rate and Arizona placing second at 2.3 percent. Texas and North Carolina grew at the same rate as Colorado, as measured from July 1, 2007, to July 1, 2008.