Trying to understand UITableView's dequeueReusableCellWithIdentifier

Hi everyone:

Say, I have the following code in tableView:cellForRowAtIndexPath:

static NSString* strCellID = @"mycell";
UITableViewCell* pCell = (UITableViewCell*)[tableView dequeueReusableCellWithIdentifier:strCellID];
if(pCell == nil)
{
 pCell = [[[UITableViewCell alloc] initWithStyle:UITableViewStylePlain reuseIdentifier:strCellID] autorelease];
}

I have "number of rows" set to 4.

So, my understanding was that if I init a table view cell with one identifier, the next time it will be reused in a call to dequeueReusableCellWithIdentifier: if the same identifier is used. Then why do I get initWithStyle:reuseIdentifier: called 4 times in the example above?