When posting a question, please post some sample data or, better yet, a packaged workbook. That makes it a lot easier for us to answer your question with your data, and get you an answer that will work for you.
I set up an example of this in the attached using Superstore Sales data. I used SUM(Sales) as a stand-in for the crime rate, Quarter as a stand-in for year (so there were enough data points), and State. I set up a variation of a moving average table calculation to generate the prior 3 Quarter and 5 Quarter averages, then used a basic % difference calc go get the change. The Compute Using for all of the table calculations is the Order Date.
Perfect, that is it.