Components of Change

U.S. & States

• IRS State to State Migration This excel table presents data prepared by the IRS on state-to-state migration flows. The data are taken from the Master File of Individual Income Tax returns filed with the IRS. For a more detailed description click here.
  
• The U.S. Census Bureau's Estimates Program produces annual data on births, deaths (natural increase) and net migration.

Colorado & Counties

• The Components of Change for Colorado table is prepared annually by the State Demography Office. It shows estimated and forecasted births, deaths, natural increase and net migration for Colorado 1970 to 2014. pdf  xls
  
• Components of Change.This user defined lookup illustrates estimates and forecasts of births, deaths and net migration data as prepared annually by the State Demography Office for Colorado and counties 1970 to 2040.
  
• IRS County In and Out Migration. This page will allow users to obtain in & out migration data as prepared by the IRS. The data are taken from the Master File of Individual Income Tax returns filed with the IRS. For a more detailed description click here.
  
• The U.S. Census Bureau's Estimates Program produces annual data on births, deaths (natural increase) and net migration for states and counties.