Testimony given to the Financial Crisis Inquiry Commission by Richard M. Bowen III on events during his tenure as the Business Chief Underwriter for Correspondent Lending in the Consumer Lending Group for Citigroup (where he was responsible for over 220 professional underwriters) suggests that by the final years of the U.S. housing bubble (2006–2007), the collapse of mortgage underwriting standards was endemic. His testimony stated that by 2006, 60% of mortgages purchased by Citi from some 1,600 mortgage companies were "defective" (were not underwritten to policy, or did not contain all policy-required documents) – this, despite the fact that each of these 1,600 originators was contractually responsible (certified via representations and warrantees) that its mortgage originations met Citi's standards. Moreover, during 2007, "defective mortgages (from mortgage originators contractually bound to perform underwriting to Citi's standards) increased... to over 80% of production".
In 2006, how many mortgage companies were contractually responsible to meet Citi's standards?
1,600