The continuous lines show the trend of how the overall special education prevalence trend has changed from 2008 t0 2013 in Hartford surrounding area, including Hartford, East Hartford, West Hartford, Wethersfield and Willington. The X-axis shows the years, and Y-axis shows the prevalence in percentage. Different trend lines show different regions and can be filtered on the right side of the chart. This graph can lead the Education Department into deeper and broader research on improving special education system in Connecticut.