Its not per share, it is assesed on the value of the trade on the sell side.
The rate currently is .0000418 per dollar.
$10,000 trade is 41.8 cents
$1,000,000 trade is 41.8 dollars
It is going down i believe to around $32/mil (not sure but something like this) on Dec 22.
0.0000333 is the rate in effect prior to December 28, 2001
0.0000150 is the rate effective December 28, 2001
0.0000301 is the rate effective April 1, 2002
0.0000252 is the rate effective March 22, 2003
0.0000468 is the rate effective April 1, 2003
0.0000390 is the rate effective February 22, 2004
0.0000234 is the rate effective April 1, 2004
0.0000329 is the rate effective January 7, 2005
0.0000418 is the rate effective April 1, 2005