randomness of Tor exit nodes

[mw_prev1@xxxxxxxxxxx]

I've been using Tor for a few weeks now and I've noticed that I don't
get much randomness in the exit nodes, I've only ever connected through
about 6 or 7 different ones.  I don't have any restrictions in place
(except for only using unverified nodes in the middle, which is the
default setting - everything else is default also).  As I understand it,
Tor should be picking a random node from a selection of over 200.  

Am I doing something wrong?
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