Swimming pool drowning deaths in the US

It is a curious fact, and one that ought to trouble us more than it apparently does, that the price networks are willing to pay for thirty seconds of our collective attention during a football game has moved in almost perfect inverse proportion to the number of Americans discovering, quite by accident, that they cannot actually swim as well as they thought they could. One goes up, the other goes down, and somewhere a data analyst is probably refreshing their spreadsheet wondering if they've finally found the pattern that explains everything.

What we're almost certainly watching here is the gentle tug of economic cycles on two entirely separate human activities. The years 2005 to 2021 bracket a financial crisis, a long recovery, and a pandemic—periods during which disposable income expanded and contracted like a accordion played by someone who'd never seen one before. When money got tight, fewer families bought pool memberships and built backyard pools; when money flowed again, advertisers got bolder. It's worth noting that Super Bowl ad costs nearly quadrupled during this period, from about 2.6 million dollars to over 5 million, while pool drowning deaths fell from roughly 3,500 annually to around 1,700—a shift large enough that you could feel the difference if you were the person affected by it.

The pattern is real, the correlation is genuinely striking, and it means almost nothing. We have discovered that two completely unrelated phenomena move together because they both respond to a third force—the slow breathing of the American economy—and we've learned this by plotting one against the other with the kind of peaceful confidence that usually precedes embarrassment. Perhaps we're getting better at water safety. Perhaps we're just getting richer. Perhaps both, perhaps neither. What we can say with certainty is that drowning deaths fell and ad prices rose, which tells us almost everything about statistics and almost nothing about the world.