Swimming pool drowning deaths in the US

As the International Space Station has received more uncrewed resupply missions per year, swimming pool drowning deaths in the US have declined, a correlation that implies either that space cargo is somehow making terrestrial pools safer or that the same species sending supplies to orbit is also getting better at not drowning in its own backyards. The coefficient is -0.887 across seventeen years, during which the supply chain to space got busier and the supply of drowning victims got smaller. Both feel like progress, though only one involves rockets.

ISS resupply missions grew from about 4 per year in the early 2000s to over 15 by 2021, as SpaceX's Dragon, Northrop Grumman's Cygnus, and other vehicles established a regular cadence of cargo delivery. Pool drownings declined as safety regulations, pool barriers, and water safety education improved. Both trends measure progress in their respective domains: one in space logistics, the other in public safety engineering. They share a direction (opposite) and a decade (the 2010s expansion of both space commerce and safety infrastructure) but not a mechanism. The rockets go up, the drownings come down, and the chart notes both with equal dispassion.

Seventeen years of space resupply missions increasing and pool drownings decreasing is a portrait of a civilization getting simultaneously better at space logistics and backyard safety, for entirely separate reasons. The cargo reaches orbit, the pool gets a fence, and the correlation between them is simply two species of progress sharing the same timeline. The station is resupplied. The pool is secured. Both required engineering.