Question: What was the 2016 population of the state where the majority of the San Luis Valley is located? 

Context articles: San Luis Valley Regional Medical Center
San Luis Valley
Colorado
San Luis Closed Basin
Colorado drainage basins
Monte Vista National Wildlife Refuge
San Luis Dam
San Luis Valley Solar Ranch
Sangre de Cristo Range
Rio Grande Dam

San Luis Valley Regional Medical Center (SLVRMC) is an acute care hospital located in the San Luis Valley in Alamosa, Colorado.
 It serves residents and visitors in southern Colorado and northern New Mexico.
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.
 The valley is a section of the Rio Grande Rift and is drained to the south by the Rio Grande, which rises in the San Juan Mountains to the west of the valley and flows south into New Mexico.
 The valley is approximately 122 mi long and 74 mi wide, extending from the Continental Divide on the northwest rim into New Mexico on the south.
 The San Luis Valley receives little precipitation and is made up of desert lands, but the temperatures can be very comfortable in the summer and very cold on winter nights.
Colorado ( ) is a state in the United States encompassing most of the Southern Rocky Mountains as well as the northeastern portion of the Colorado Plateau and the western edge of the Great Plains.
 Colorado is part of the Western United States, the Southwestern United States, and the Mountain States.
 Colorado is the 8th most extensive and the 21st most populous of the 50 United States.
 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.
The San Luis Closed Basin is a 2,940-square-mile endorheic basin in the Alamosa and Saguache counties of south-central Colorado.
 It includes San Luis Creek and its tributary, Saguache Creek.
 While the basin is east of the majority of the Rocky Mountains, it lies west of the Sangre de Cristo Range.
 An elevated plateau in Alamosa County, the San Luis Hills, separates the San Luis Closed Basin drainage from most of the San Luis Valley, which is southward-flowing and drains through the Rio Grande.
The U.S State of Colorado includes the headwaters of several important rivers.
 The state is divided into two major hydrographic regions by the Continental Divide of the Americas.
 East of the Continental Divide, surface waters flow via the South Platte River, the North Platte River, the Republican River, the Arkansas River, the Cimarron River, the Canadian River, or the Rio Grande to the Gulf of Mexico.
 West of the Continental Divide, surface waters flow via the Green River, the upper Colorado River (formerly the Grand River), or the San Juan River into the Colorado River and on to the Gulf of California.
 Colorado also has three significant endorheic basins: the San Luis Closed Basin in the San Luis Valley, and the Bear Creek Basin and the White Woman Basin spanning the Colorado-Kansas border north and south of the Arkansas River.
Monte Vista National Wildlife Refuge is a United States National Wildlife Refuge located in southern Colorado.
 The refuge is located in the San Luis Valley approximately 10 mi west of the town of Alamosa in southeastern Rio Grande and western Alamosa counties, in the watershed of the Rio Grande.
 It administered jointly with the nearby Baca and Alamosa refuges by the United States Fish and Wildlife Service.
 It was established in 1953 by the Migratory Bird Conservation Commission to provide a habitat for wildlife, particularly waterfowl, in the San Luis Valley.
San Luis Dam (also known as B.F. Sisk Dam, after Bernie Sisk) is a major earth-filled dam in Merced County, California, which forms San Luis Reservoir, the largest off-stream reservoir in the United States.
 The dam and reservoir are located in the Diablo Range to the east of Pacheco Pass and about 10 mi west of Los Banos.
 San Luis Dam, a jointly-owned state and federal facility, stores more than 2 million acre feet (2.5 km) of water for the California State Water Project and the federal Central Valley Project.
 Although the dam is located in the valley of San Luis Creek, the majority of its water comes from man-made aqueducts which are supplied from other rivers in Northern California.
The San Luis Valley Solar Ranch is a 30 MW photovoltaic solar power facility near the town of Mosca, Colorado, in the San Luis Valley.
 It uses single axis sun tracking.
The Sangre de Cristo Range, called the East Range locally in the San Luis Valley, is a high, rugged and narrow mountain range of the Rocky Mountains in southern Colorado in the United States, running north and south along the east side of the Rio Grande Rift.
 The mountains extend southeast from Poncha Pass for about 75 miles (120 km) through south-central Colorado to La Veta Pass, approximately 20 miles (32 km) west of Walsenburg, and form a high ridge separating the San Luis Valley on the west from the watershed of the Arkansas River on the east.
 The Sangre de Cristo Range rises over 7,000 feet above the valleys and plains to the west and northeast.
Rio Grande Dam is a dam in Hinsdale County, Colorado impounding the Rio Grande.
 Built between 1910 and 1914 by the San Luis Valley Irrigation District to store water for agriculture in the San Luis Valley, Rio Grande Dam is an earth and rock fill dam 111 ft high and 550 ft long.
 The dam impounds the Rio Grande Reservoir, with a capacity of 52000 acre feet .