mr. goldenkoff, please proceed. >> mr.hairman, ranking member brown, are they to thank you for the opportunity to be here to discuss lessons learned in the 2010 census and initiatives that show promise for enumeration and 2020. 2010 census is an operational success in the census bureau generally completed its peak data collection activities can disable the plan an early city is to apportion redistrict congress on the days ahead of legally mandated deadlines. nevertheless, enduring up for the enumeration, the bureau had to overcome a series of hurdles such a basic complete account. first, internal issues including long standing wheat said in team management procedures threaten the beer's readiness for the enumeration in my best to add the 2010 census to the list of programs. at the same time, external societal trends such as increasingly diverse population have made a headcount inherently difficult. much like going down the escalator, over the past 40 years, they've been investing more resources each decade to secure a secu

mr. goldenkoff's observations are all right on the same page. we are in agreement with what dr. groves has laid out. i think of what we would want to see more of that is more attention paid to some of the nuts and bolts management's issues for budgeting and project management. >> i am glad to suspend record. i wanted to ask senator brown to do something. i'll pick where we did pick up where we started. >> thank you, mr. chairman. mr. groves, the costs at been unsustainable. one of the measures of costs per household on from $16 to over $12 billion for 1990 to 2010. and we cannot continue on. what is called the -- what has caused the explosive growth? >> if you look over the decades, there are several drivers to it. one has to do -- most of the drivers could focus in on the non-response follow-up procedures. people are sent mail questionnaires. >> how much does the mail actually costs? i know i get about 30 of them. >> what we said throughout the senses -- census this year was to return it cost about 42 cents, to call in your household costs us about $57. that is the ratio that i