Data is the raw "stuff" that is analyzed to create statistics. They both come in several forms: numeric (or quantitative), spatial, and qualitative (includes interviews, opinion data).
There is some semantic overlap between the two terms, so don't be surprised to hear the same figure referred to as data or a statistic. Plus, one person's statistic (interpreted data) may in turn be someone else's data, to be re-interpreted and used for a different purpose! Don't worry too much about the terminology--the important point is:
If you need a quick figure or single fact, check existing statistics first.