[KongchangAI]
Unverified50% confidenceFactExact time

美国工会覆盖率1954年峰值约35%,至2023年跌至约10%,私营部门更低至约6%

1
Sources
50%
Confidence
Long-term
Relevance
7/16/2026
First Seen

Sources

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https://kongchang.com/claim/529533
API
curl https://kongchang.com/api/v1/knowledge/claims/529533
MCP
get_claim(id=529533)