VB.Net Mail Merge

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I'm trying automate a mail merge in VB.Net as a spike/proof-of-concept.

The resulting mail merge document should look very roughly like this:

<<Customer FullName>>
<<Customer Address>>

Dear <<Customer FullName>>,

Your details are as follows: (table below idealily has a single row
containing <<Year>>, <<X>>, <<Y>> etc. in the template and merge
populates the data adding rows as necessary)

-----------------------------
| Year | Value X | Value Y |
-----------------------------
| 1990 | 10 | 15 |
| 1991 | 11 | 16 |
....

| 2003 | 19 | 01 |
-----------------------------

Your Sincerely,
Mr. X

Right so doing a fairly simple mail merge is easy, but I've yet to
figure out the best way to do the whole results table thing (different
customers, different data, different number of rows etc.).

I could just programmatically get the customers data and loop through
it adding rows to the table as needed but that doesn't strike me as the
most elegant possible solution. I could also build the largest possible
required table and then delete empty rows but that's going to be
unsightly and inefficient, possible error prone too.

Are there any other ways to handle this kind of dynamic table
generation and merging or data in Word? Any suggestions appreciated!
P.S. Have yet to decide on format of data source, currently just using
a word doc with a table for the simple mail merge.