Ticket #3366: usage.pdf

This is what I got from the tagwatch for Germany. I included keys with at least 50.000 uses. I expanded keys where it made sense up to values with at least 5.000 uses. The "max" value notes if tagwatch only looked at the first 300 values for this key, so some keys might be missing. I haven't looked into the data yet, so feel free to suggest useful toolbar buttons :)