of house having reported to this chamber, to this body, matt franklin and before matt franklin, marsha rosen. nonprofit housing developers are required each year to submit a report on the income levels and qualifications of each household member of continuing to reside in their unit. that's to the city and county of san francisco. in addition, every two years, if a develop has h.u.d. money it must file such a report or similar report with h.u.d. we know exactly how many people and what qualifications they have and whether or not they meet the requirements of the development of housing. that's how we provide housing in san francisco. we provide housing to people at certain income levels. and the city tasks to make sure that those people continue to meet those income levels. it is a base misstatement of fact that a, that information has not been given to you and b, that somehow it has escaped our minds. second of all, it isn't 50% of the housing that is subsidized in san francisco. folks, it's 100%. the largest housing subsidy in this country is mortgaged tax deduction. 100% of the housing mar