Blue Container Recycling Revisited

I've reported about The Blue Containers for recycling in our part of town a while ago. In the meantime we've been good kids and used the blue bag supplied to us to collect all kind of (suspected) recyclable material. Usually when I emptied it in the blue containers I had a good look inside to see if others were using them properly or if they'd just end up as normal garbage containers. I was surprised about how much the recycling containers were used appropriately. I even observed other people emptying their blue bags into the blue containers.

Today when I went to the blue container nearest the apartment, I noticed it full up and overflowing, with stuff in bags. Theoretically this could have been recyclable stuff, but I really doubt it. Went to the next one, same game (there were even normal garbage containers next to it, practically empty, so either someone had a lot to recycle or else they just started to dump their garbage into the first container they saw). The third try was successful.

I would really like to learn more about this recycling program: How high is the recycling rate? Where are things separated, where are they recycled? Haven't seen any resources on this so far.