Percentage of Those 25-to-34 Years Old With at Least a High School Diploma
Since younger adults on average have higher educational attainment than older adults, some of the differential in educational attainment between Arizona and the nation could result from differences in the age distribution. In order to control for this, comparisons are made for those between the ages of 25 and 34. However, sampling error becomes an issue in Arizona in the annual estimates of this subset of the population.
Among those 25-to-34 years of age, the percentage of high school graduates increased nationally and in Arizona between 2005 and 2013. A lower percentage of Arizonans had earned at least a high school diploma in each year.