Drawing dimensions - round number tolerances

Hi there, for some reason when I add a dimension to a drawing, if the number is a round number, it doesn't show any decimal places. The dim tolerance is set to 2 decimal places, which works fine for most dims, but not if its a round number.  Even if I 'override' the dim, to say 19.00mm, it shows up on the page as 19mm.

Any ideas?

Thanks,

Tom

SolidworksDrawings And Detailing