The Colorado State Demography Office (SDO) applies a basic Components of Change Method to create annual (July 1) State and County Population Estimates. The method varies slightly for our July 1st 2010 estimates in that it starts with the April 2010 Census counts and then applies components of change (births, deaths, net migration) from April 1st through June 30th 2010. The rest of the decade the estimates will be based July 1st to July 1st.
