Those Cospas-Sarsat numbers are for EPIRBs (Emergency Position-Indicating Radio Beacons), which signal maritime distress and ELTs (Emergency Locator Transmitters), which signal aircraft distress, in addition to PLBs. While we mere people are allowed to carry PLB's, aircraft and larger boats/ships are required to carry ELT's and EPIRB's.

I wonder what the stat's would look like if aircraft and larger boats/ships were merely "allowed" to carry emergency beacons -- fewer saves would be my guess.