I want to create a 12 month binned or rolling average to help smooth the data. I currently have monthly averages in the file. Since a 12 month rolling average needs 12 months of course, the first 11 rows will not have a binned average. I would prefer to create a separate output file with a 3 column for the binned average next to the corresponding YYYYMM. I could then create a graph showing the monthly data alongside the smoothed binned average.