https://www.vice.com/en_us/article/y3pv9v/european-cops-helped-15-million-people-decrypt-their-ransomwared-computers

In the last six years, European cops estimate that they have helped around 1.5 million people and organizations decrypt files that were locked by hackers with ransomware, saving around $1.5 billion.  

Europol, the European Union law enforcement agency, announced the figures on Tuesday, a day that marks the sixth anniversary of the No More Ransom project, which brings law enforcement and private industry partners together with the goal of providing decryption tools and other support for ransomware victims.