Sample Size - Data – Methodology – American Community Survey

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Sample Size - Data

United States

Initial Addresses and Sample Selected and Final Interviews

Year	Initial Addresses Selected	Final Interviews	Initial Sample Selected	Final Actual Interviews	Final Synthetic Interviews ¹
	Housing Units		Group Quarters People
2011	3,272,520	2,128,104	204,553	148,486	150,052
2010	2,899,676	1,917,799	197,045	144,948	N/A
2009	2,897,256	1,917,748	198,808	146,716	N/A
2008	2,894,711	1,931,955	186,862	145,974	N/A
2007	2,886,453	1,937,659	187,012	142,468	N/A
2006	2,885,384	1,968,362	189,641	145,311	N/A
2005	2,922,656	1,924,527	N/A	N/A	N/A
2004	838,293	568,966	N/A	N/A	N/A
2003	828,590	572,447	N/A	N/A	N/A
2002	742,409	512,768	N/A	N/A	N/A
2001	858,058	601,875	N/A	N/A	N/A
2000	890,698	587,519	N/A	N/A	N/A

¹ Synthetic interviews were part of an effort to improve American Community Survey estimates of the group quarters population for substate areas. Synthetic interviews were created by imputing the characteristics of interviewed group quarters persons into group quarters facilities that were not in sample that year or period. Final actual interviews are the interviews obtained from sampled group quarters residents. For more information, read the ACS Group Quarters Small Area Estimation user note.

American Community Survey

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Sample Size - Data

United States

Initial Addresses and Sample Selected and Final Interviews