You're going to have to write the output of the query to a table. If the table is not 37 records long, you'll have to run an append query to append X blank records to your table until you get 37 records.
To prevent the original query from giving you more than 37 records to start with, set the query property "Top Values" equal to 37.
OK, now I'm curious. Why would anyone want a query to give 37 records even though the true output may be less?
Michigan Dept. of Environmental Quality, Air Quality Division