Hi Mabel
It might be a problem. What you are actually saying is that you didn't run Year-End Processing, which means your YTD statistics didn't move to "Last Year" and start from zero with the new year.
If you don't look at these statistics, then it is not a problem. If you do and want to fix them, the easiest way is using Toolkit for Adagio, by Dakota Software, which has a feature that refreshes the statistical fields after-the-fact.
Steve