Of course this doesn't mean 115m people but it shows internet penetration is on the rise from less than 90m 4yrs ago.
Even those that can afford, also look for free WiFi in public/private places like hotels, cafeteria, etc
In their minds, it is free internet....let's finish it. Time has proven this may be risky.
With free WiFi comes some vulnerabilities.
Therefore, you have to be careful.
While few may be from people who forgot to password their hotspots, some are set up to provide free internet to collect personal information.
While you feel at home chat, emailing or shopping, they are busy logging your personal information for later use.
That's why some corporate don't make their SSID discoverable.
It is that name you see when you ask your Wireless to discover networks that are within your reach.
If you can't find it, you have increased the odd of being connected to.
Just as 1234, admin, password, 1960, etc as password are easy meat....keep your password complex and difficult to guess.
Shutdown your hotspot when not in use.
Next, if you have to, make sure you connect to them through secure tunnel/VPN or browsers.
As much as possible, limit exchange of personal information via free internet.
Limit visiting e-commerce websites.
Better still, have an account with limited funds, disposable and for miscellaneous use....and spend from there not the primary account where your salary drops.
Secure connection is critical to your personal information. Ask for it.
Hotels are becoming major targets because they welcome diverse data - bank information from visitors.