Well, make a new table with the following field names:
Date
Category (i.e. NA, NT, NP etc. - however you'd describe these)
Value (Or whatever the numbers represent)
Then, when you enter data, you'll enter date, category and value, one per line. (You can get the data from your other table into this one no probs, just a bit time consuming - a series of update and append queries will do this).
When it comes to tabulating the data, create a crosstab query based on this table. Drag down Category as a row header, date as a column header and Value as value. Run it, it'll look like the table at the bottom of your original PDF.
Then, you can use the crosstab query as the source object of a subform in your main form, job done!