In 2022, the Civil Service Retirement System (CSRS) accounted for 56% of all federal annuitants, totaling 2,226,760 individuals, while the Federal Employees Retirement System (FERS) covered the remaining 44%. Despite a larger share of retirees, only 1.6% of current federal employees are under CSRS, with the majority (98.4%) participating in FERS. https://www.federalpensionadvisors.com/post/how-many-retirees-are-under-csrs