Door entry keypads -- top row bias
I've just been introduced to a number of places with door entry keypads. All the four digit codes start on the top row. (1xxx, 1xxx, 2xxx, 1xxx, 2xxx) This is old-people's homes so not ultra security. Is this common?
Would anyone like to supply a triplets of
[Total experience No, Top row start (incl 1), starts with 1]
and we'll see if there is a 'one from the top then...' bias.