Not necessarily that important, but Ubuntu's versioning scheme doesn't work the way you think it does.

It's <year>.<month> and they release a new version almost always in April and in October, meaning that the past few Ubuntu versions were 14.04, 14.10, 15.04, 15.10 and now 16.04, which is what you're running.

They then have the usual dot-releases appended to that, so you're probably actually running 16.04.1, the first revision of 16.04.

So, yeah, you would usually say that you're running "16.04", not just "16", as 16.10 will be a completely different version, again...