From the Fraud Magazine news article:

…Although losses from ransomware were relatively minor in its earlier years, they’ve grown significantly from about $24 million in 2015 to $1 billion in 2016, according to Danny Palmer in his Sept. 8, 2016, ZDNet article.

And back in May 2017, Jonathan Berr of CBS’s Moneywatch said that losses from the “WannaCry” ransomware alone (described below) could reach $4 billion in 2017…

Read more at the link: http://www.fraud-magazine.com/article.aspx?id=4295000289