There is a modest but not significant trend for improvement over time for most districts, including Andover (thick blue line). When arranged by median higher education enrollment over time (2006-2015), the interface between the second (green) and third (purple) quartiles), five districts were significantly lower (*) and no districts were significantly higher in higher education enrollment than Andover. In 2015, Andover ranked sixth among the group (no change from 2014).