I feel we should remember that tobacco is a natural product. Each crop each year varies slightly. If comparing bulk and tinned versions where they the same batch? Same field even?
All this makes a definitive answer difficult
Approximately 60 years but huge gap in the middle . Now 1 or 2 bowls a week. No other source of nicotine. About 30 pipes. French and british mostly. Cellar about 6lbs give or take.