I was at all of those games, and I seem to recall a fairly substantial number of people up on the upper deck. I think the lower bowl maxes out at just over 19k since they got rid of the seats behind the north goal when the Nats moved into RFK.
Not for the game against Chicago in 07, that was the first one where the upper deck was closed, so the Fire supporters were placed in the corner of the 300s back behind the Screaming Eagles.
