Not seeing any "date" field in your data.
How you get year to year delta?
There no date on it there should be on there..
I'm not clear on the goal/question here. As mentioned, no dates are in the workbook but you asked for year to year difference or similar.
Can you clarify what your question/expected output is, and what is shown in the attached workbook? The more detail, the better!
I added the correct workbook called HistogramEX