这是由美联储经济数据库（FRED）托管的美联储数据集。 MDOAH.csv MDOTHIOH.csv MDOTP1T4FR.csv mortgage-debt-outstanding-all-holders_metadata.json mortgage-debt-outstanding-by-type-of-holder-individuals-and-other-holders_metadata.json mortgage-debt-outstanding-by-type-of-p