We’re digging into the 2015 public library data collection, but one ‘bite’ is:

There were 302 libraries reporting all of the years  from 2006-2015.

For that decade:

The Total Operating Expenditures were: $6,197,134,922.
Total General Materials Expenditures were: $538,752,055.
The libraries circulated a total of 1,260,217,449 items.

Yep – that’s 1.2 BILLION!