More Americans are driving without car insurance, and it’s making coverage more expensive for everyone else. The problem has been growing since the start of the Covid-19 pandemic, according to the Insurance Research Council, whose latest data show the percentage of uninsured drivers rose to 14% in 2022, from about 11% in 2019. The IRC, which calculates the data based on the relative frequencies of auto-insurance claims, expects the numbers have continued to climb since then. Washington, D.C., New Mexico and Mississippi are among the jurisdictions with the highest share of uninsured motorists, the IRC says. Washington has recorded almost...