Once again, a key takeaway is deadly obvious: Prior to 2007 the Patriots were right in line with the league averages across the other nondome teams. When you look team by team, they literally are in the middle of the pack for most seasons. But starting in 2007, all similarities totally vanish.
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The bottom line is, something happened in New England. It happened just before the 2007 season, and it completely changed this team. Any NFL investigations into allegations that the Patriots played regularly with deflated footballs would be wise to reference my research herein and to begin starting in 2006. That was when Tom Brady was able to help persuade the NFL to change its rules to allow him (and other quarterbacks) to provide their own footballs for all road games.