Also this past summer ...

My contract with my ISP includes 40GB data usage per calendar month (over the used-to-be-BT landline; I don't have one of those fancy phones). It's a big increase from my previous contract, where I was always paying by volume for extra usage. This summer I started paying attention to the figures on the bill.

( have some statistics )

I just had to update the software again (disabling the Java that's already running? That's a bit extreme isn't it?), so I'll get some idea how much difference that made when I get my next bill.