19, which is the number of financial institutions that reported a “cyberassault” last year. As Ellen Nakashima and Danielle Doulas of the Washington Post report:

Almost all reported that they were targeted in last year’s highly publicized “distributed denial of service attacks” (DDOS) — efforts to disrupt access to Web sites by barraging servers with computer traffic. The assaults, which are ongoing, made headlines in the fall when U.S. officials said they believed they were launched by the Iranian government in retaliation for sanctions imposed because of Tehran’s nuclear program.

Nakashima and Doulas go on to say that some analysts calculate the cost of dealing with these attacks in the “hundreds of millions.”