https://about.usps.com/newsroom/national-releases/2021/0806-usps-reports-third-quarter-fiscal-2021-results.htm

Total operating expenses were approximately $21.4 billion for the quarter, an increase of approximately $1.6 billion, or 8.3 percent, compared to the same quarter last year. Excluding costs resulting from actuarial revaluation, discount rate changes, and amortization of unfunded liabilities, which are outside of management's control, expenses increased by $334 million or 1.7 percent, compared to the same quarter last year.