这是由美国联邦调查局经济数据库（FRED）托管的美国人口普查局的数据集。 breakdown-of-revenue-by-type-of-customer-business-for-travel-agencies-all-establishments-employer-firms_metadata.json breakdown-of-revenue-by-type-of-customer-household-consumers-and-individual-users-for-wired-t