[the_duke]

The original title does not contain "terryfing", so please remove that.

Also, I fail to see wha's so terrifying about that.

In 2015 it looks like 10-15 rentals a day.

[manmal]

If you refer to the map, it shows the new rooms-to-let added on that particular day. Rest assured that there were/are hundreds to thousands of transactions per day in Amsterdam. OP used this datasource: http://insideairbnb.com/get-the-data.html