I originally posted my question because I thought that maybe what notes you get from your ATMs affect the distribution of notes in EBT. Now that they have the cool tables that show each denomination's distributions, I could verify that this really isn't true, at least not very strongly.
These charts are based on the number of notes on each "country" row in the table, and I summed up the two Germany rows. So it's only to give a rough idea of what values are entered to the database the most. As it seems that in most countries you can get any denominations from the ATMs it does not affect the distribution much.
Furthermore, in some countries people still use "human" tellers to withdraw cash. I'm assuming that in Finland it's almost down to 0% (unless you want larger sums) so you could say that what you get from ATMs has an effect on the distribution. But what kind

?
The final question is: when do you enter your notes? Does it happen, for example, that you "charge your wallet" before going shopping, so you spend the higher denominations you may have received from the machine, and end up entering the change (your 5 and 10 euros) to the database? Or are people as meticulous as to write down all serial numbers before spending them?
I've noticed personally, that I have started to use cash more now that I've joined the eurobilltrackers, just to increase my chances of one day finding out that one of the notes I have used maybe reappear somewhere thousands of kms away... Call me a geek, I don't mind.
Happy tracking, everyone!