Drop-down menu line chart showing (1) the number of federal union members, (2) the number of federal workers covered by a union contract, and (3) the total number of federal workers by quarter for 2023, 2024, and 2025. Among union members and union-covered workers, the 2025 series (red) starts notably higher in the first quarter, declines sharply in the second quarter, rebounds a bit in the third quarter, and falls again by the fourth quarter. In contrast, 2023 (medium blue) and 2024 (navy) show relatively steadier patterns with gradual increases toward year-end. Overall, federal unionization fluctuates much more sharply in 2025 than in the prior two years. However, overall federal employment appears far less volatile than union membership and coverage.