See attached. I've replaced your manual numbering with Word's Heading Styles using multi-level list numbering. Adding a new row to the table will result in that row's numbering incrementing. Changing the heading level will re-set the numbering accordingly.
For instructions in setting up & using multi-level list numbering, see:
http://www.shaunakelly.com/word/numb...g20072010.html
See also the discussion in this thread:
https://www.msofficeforums.com/word/...level-3-a.html