How many CHURCHGOING Anglicans does Lambeth represent?

http://www.anglican-mainstream.net/2008/07/27/how-many-churchgoing-anglicans-does-lambeth-represent/

[Anglican Mainstream] 28 Jul 2008--A lot of things have been said over the last few months about just who represents whom in the Anglican world. GAFCON, for example, is pilloried by the media and the leadership at Lambeth as a "breakaway" movement.

But, is this right?

Already some journalists are beginning to realize that while the Lambeth Conference might have a large number of bishops in attendance, those bishops actually represent a SMALL MINORITY of the world’s Anglicans.

I have done some informed arithmetic, and the result is surprising.