The most likely culprit here is the economic cycle grinding away in the background like a cosmic engine. Between 2015 and 2021, the US economy shifted from steady growth to pandemic chaos and back again, and with it came changes in consumer spending, fuel prices, and recreational activity patterns. The fewer coins minted likely reflects declining cash transactions (more digital payments, fewer vending machines, less pocket change in circulation), while ATV deaths may have fluctuated with disposable income, gasoline prices, and the simple fact that during economic uncertainty, people do fewer things that end with a helicopter ride to the nearest trauma center. A typical ATV-related fatality costs the healthcare system somewhere north of $150,000 in emergency and long-term care, which is, to put it in perspective, roughly equivalent to the wholesale value of about 30 million pennies.