The White House is calling on quick action to address the nationwide infant formula crisis, but producers see this issue lasting throughout the rest of the year. Datasembly is an agency that tracks how much of various products are on store shelves. During the first half of 2021, the out-of-stock rate for formula was relatively stable and fluctuated between 2% and 8%, but last summer saw the start of a slight increase that hit 11% in November.