Final answer:
The information provided does not specify the percentage of contingent workers in the U.S. workforce. For up-to-date statistics on this demographic, the Bureau of Labor Statistics reports should be consulted directly.
Step-by-step explanation:
The Bureau of Labor Statistics gathers comprehensive data about employment, including the workforce composition and levels of unemployment.
While the included information focuses on union memberships, unemployment rates, and the labor force, it does not specify the exact percentage that contingent workers represent.
In the context of the U.S. workforce, contingent workers may include freelancers, independent contractors, consultants, or part-time employees who do not have the security of a permanent job.
Statistics about such groups are vital for understanding labor trends and can influence economic policy and business practices.
In the absence of a specific figure within the provided information, it is advisable to consult the latest BLS reports or their official website for the most current data regarding contingent workers as part of the total workforce.