Is stopping lifesupport, when someone is not leading anything resembling a life anylonger, murder?
Or is it, as your quote states, "shortening" once life.
But yes, we practice euthanasia in our clinics. We did it 20 years ago, we still do it today (although with a shitton of regulations). You'll have to bet those physicians who shortened the lifes of patients without their explicit request had to get through a bureaucratic maze before they could even release a patient from his suffering. Do note that an explicit request in this case means to have a documented request, recorded in presence of a certain official (i.e. solicitor). If the patient just says "I'd like to end my life", that does not constitute as an explicite request.
Still, the numbers Mr Santorum used were either outdated or falsified, as you yourself found a much smaller number.
Other points he notes as facts, such as elderly wearing bracelets saying "do not euthanize me" (there are however bracelets that say "do not reanimate me"), elderly evading dutch hospitals, those are all blatant lies.
Maar doodslaan deed hij niet, want tussen droom en daad,
Staan wetten in de weg en praktische bezwaren,
En ook weemoedigheid, die niemand kan verklaren,
En die des avonds komt, wanneer men slapen gaat.