What was the 2016 population of the state where the majority of the San Luis Valley is located? 
San Luis Valley: The San Luis Valley is an extensive high-altitude depositional basin in the U.S. state of Colorado with a small portion overlapping into New Mexico covering approximately 8000 sqmi and sitting at an average elevation of 7664 ft above sea level. Colorado:  The United States Census Bureau estimates that the population of Colorado was 5,540,545 on July 1, 2016, an increase of 10.17% since the 2010 United States Census.
5,540,545