According to FBI statistics over 80% of burglaries are never solved - in over 4 out of 5 burglaries, the criminal gets away with it. Most burglaries are by forcible entry and most burglaries target homes.
Another amazing statistic was that only 16.5% of reported property crimes were cleared by arrest or exceptional means (2004 FBI Crime Report). This means that the majority of the reported burglaries were not resolved with an arrest. In plain English the burglars got away with the crime.
Home Security and Home Invastion Tips for 2006 - Free Press Release Distribution Service