Pulling data from list into month/year table

Hey Guys,

I am trying to create a table (years on top, months on side) to track my utility meter data. I have a lot of data with random start and end dates and i've been trying to get the data ("Average daily consumption normalized for calender" column) to simply go into the cell that applies to it (example: if I had a meter start date of august 10th 2007, I would want that to pull from the list into the table cell for august 2007.) The main problem I'm having is getting it to recognize the years and format it correctly. At first this seemed an easy task, but I've given it a few days work, tried many things, and not much has proven successful. Below are a few images of what i'm looking at and trying to accomplish. One is of the list I'm trying to pull from, and the other is the table i'm trying to put the data into. I would appreciate any help or advice. Thank you. expirement table 1.jpgexpirement table 2.JPG