Recent export data show differences between our weekly and monthly estimates. In our February release of the Petroleum Supply Monthly (PSM), we report that the United States exported slightly more than 9.6 million barrels per day (b/d) of crude oil and petroleum products during December 2021. This volume of exports surpassed the all-time record of slightly less than 9.6 million b/d in February 2020 (Figure 1). The export volumes in the PSM were 1.7 million b/d higher than preliminary exports reported in our Weekly Petroleum Status Report (WPSR), in which we estimated that exports averaged 7.9 million b/d in December.