I was recently building a dashboard for a client and one data set was particularly challenging. The data looked at rates from 0 to 100% (exactly what it was measuring isn't important). Each row in the data showed a rate for a given product category on a weekly basis for an entire year. So one product category would have 52 rows associated with it - a rate for each week. If there were 10 product categories, there would have been 520 rows of data.
