my guess is its something to do with how the database counts a "search".That's 17 times every second. ???
I dont know but it came from a reliable source
it combines border control, law enforcement and vehicle registration
The Schengen Information System (SIS) is the most widely used and largest information sharing system for security and border management in Europe
At the end of 2017, SIS contained approximately 76.5 million records, it was accessed 5.2 billion times and secured 243 818 hits (when a search leads to an alert and the authorities confirm it).