This penetration table is fairly well known. It appears in several period publications and a translated version was even sent to the USSR. Nevertheless, it gives some information as to how well the guns of the Western Allies performed against German armour.
However, there was one interesting observation made that didn't come along with this table to any other publication. Since hitting a tank at 2000 yards was very difficult, and the 2-pounder could penetrate older German tanks in the front and even newer ones from the side at nearly that distance, what was the point of having a 6-pounder at all?