Library use increase linked to rise in homelessness and jobless rate

The recent flurry of library use increase statistics as shown in the graph below adds in the public space and urban design issues of public space use as linked to economic trends.

what exactly do they use it for? are they siphoning off the free internet, are they reading and educating, are they using the public bathroom facilities, getting out of the rain, or the heatwaves, or are they sleeping?