1. Wage and salary workers who expect their jobs will last for an additional year or less and who had worked at their jobs for one year or less. Self-employed workers and independent contractors are excluded from this estimate. For temporary help and contract workers, contingency is based on the expected duration and tenure of their employment with the temporary help or contract firm, not with the specific client to who they are assigned.

2. Workers including the self-employed and independent contractors who expect their employment to last for an additional year or less and who had worked at their jobs (or been self-employed) for one year or less. For temporary help and contract workers, contingency is determined on the basis of the expected duration and tenure with the client to whom they are assigned, instead of their tenure with the temporary help or contract firm.

3. Workers who do not expect their jobs to last. Wage and salary workers are included even if they already had held the job for more than one year and expect to hold the job for at least an additional year. The self-employed and independent contractors are included if they expect their employment to last for an additional year or less and they had been self-employed or independent contractors for one year or less.