I agree with Joe and am glad to see him asking the Creators.
However, if it is always 5 digits you could cheat a little bit and pretend the decimal point you could do at the "thousands mark" is a comma. Just a little bit of division/maths beforehand. Even having the dec point might be a good enough separator for now, giving that little bit of extra clarity. Depends what country you are in.
I quote from something copied from a site and have underlined the important bit:
Great Britain and the United States are two of the few places in the world that use a period to indicate the decimal place. Many other countries use a comma instead. The decimal separator is also called the radix character. Likewise, while the U.K. and U.S. use a comma to separate groups of thousands, many other countries use a period instead, and some countries separate thousands groups with a thin space.
In Aus it is getting hard to keep up with constantly changing norms, seemingly dictated by what is PC or trendy at the time. Used to be commas, but supposedly it is now the thin space.