(USA Today) — Federal employees’ job security is so great that workers in many agencies are more likely to die of natural causes than get laid off or fired, a USA TODAY analysis finds.

Death — rather than poor performance, misconduct or layoffs — is the primary threat to job security at the Environmental Protection Agency, the Small Business Administration, the Department of Housing and Urban Development, the Office of Management and Budget and a dozen other federal operations.

The federal government fired 0.55% of its workers in the budget year that ended Sept. 30 — 11,668 employees in its 2.1 million workforce. Research shows that the private sector fires about 3% of workers annually for poor performance, says John Palguta, former research chief at the federal Merit Systems Protection Board, which handles federal firing disputes.

The 1,800-employee Federal Communications Commission and the 1,200-employee Federal Trade Commission didn’t lay off or fire a single employee last year. The SBA had no layoffs, six firings and 17 deaths in its 4,000-employee workforce.

When job security is at a premium, the federal government remains the place to work for those who want to avoid losing a job. The job security rate for all federal workers was 99.43% last year and nearly 100% for those on the job more than a few years.

HUD spokesman Jerry Brown says his department’s low dismissal rate — providing a 99.85% job security rate for employees — shows a skilled and committed workforce. “We’ve never focused on firing people, and we don’t intend to start now. We’re more focused on hiring the right people,” he says.