METHODOLOGY PDF: http://www.stats.indiana.edu/labor_proj/LaborForceProjectionsMethodology.pdf .
The primary data inputs for these labor force projections are the IBRC’s population projections, which were released in March 2012, and age and sex-specific labor force participation rates (LFPR) for the state and each county derived from the U.S. Census Bureau’s 2010 American Community Survey (ACS). The labor force estimates are calculated by taking five-year age and sex population cohorts in a given year and multiplying them by the appropriate LFPR. The exceptions to the five-year cohorts are the youngest age group (age 16 to 19) and the oldest age group (75 and older). County results were controlled to the state totals.
*** Added to Socrata by copying online web data to Excel and saving as CSV