* 5-year estimates give the average value for the county over the five years of the sample. Data series considered of low reliability overall due to sampling error; use with great caution and see note flags on individual data points.

Years Available: 2005-2009, 2006-2010, 2007-2011, 2008-2012, 2009-2013, 2010-2014, 2011-2015, 2012-2016, 2013-2017, 2014-2018

Permanent Link: http://data.sagepub.com/sagestats/7077

General Notes: *Median value gives the value for the "average" county for this metric, the 50th percentile of all counties reporting data. **American Community Survey (ACS) 5-year estimates are used to enable all counties to be included in the dataset. These give the average value for the county over the course of five years. See the Source Note for the ACS for more details. Beginning in 2006, the population in group quarters (GQ) is included in the ACS. Some types of GQ populations may have educational attainment distributions that are different from the household population. The inclusion of the GQ population could therefore have a noticeable impact on the educational attainment distribution. A # symbol indicates the following: This data value has medium reliability. Please use with caution. A ! symbol indicates the following: This data value has low reliability. Please use with great caution.