3. Spain

Breach Density: 78
Accounts Breached Per Day: 40,933
A cyberattack targeted a major hospital in Barcelona in March, crashing the Hospital Clinic de Barcelona’s computer system and forcing the cancellation of 150 non-urgent operations and upwards of 3,000 patient checkups.
Regional government telecommunications secretary Segi Marcén told AP News at the time that the cyberattack was carried out by a group called Ransom House which cut off the hospital’s access to patient’s records and blocked communication between units.
The group had not asked for a ransom, but the government was adamant that it wouldn’t have paid up.