CPR stands for Cardio Pulmonary Resuscitation. It is the basic first aid that is applied to people who in case of an accident or injury have stopped breathing or their heart stops beating. Since it is a basic first aid practice done all over the world, there are no records or figures to prove the number of lives that have been saved by this process.
A sudden cardiac arrest victim's chances of survival fall 7 percent to 10 percent for every minute of delay until defibrillation (AHA). Literally every second matters! Like Aicha said, there is no record on the number of lives CPR has saved.