The $5 Mil was stolen over several years.
The 103 thefts were only over a 3 months.
So that is 34 thefts a month, 408 a year.
$5 Mil by $400,000 gives 12.4 years, or 5100 thefts
The per theft amount at that rate is just $980 per theft
Still not an easy job but doable.