The type correllations have no doubt been discussed before, but I'd like to do a simple poll.
The following site provides a quick review of correlations made by different authors:
Note the coloured table at the bottom of the page.
To answer the poll, look to see how your enneagram type is supposed to correlate with your MBTI type and answer the following on the poll:
Black - More Common
Dark Blue - Quite Common
Light Blue - Less Common
White - Least Common