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Title:               Net County-to-County Migration Flow (5-year estimate) for Scott County, IA
Series ID:           NETMIGNACS019163
Source:              U.S. Census Bureau
Release:             Net Migration Flows for Counties and County Equivalents in the United States
Seasonal Adjustment: Not Seasonally Adjusted
Frequency:           Annual
Units:               Persons
Date Range:          2009-01-01 to 2020-01-01
Last Updated:        2023-04-03 2:26 PM CDT
Notes:               The American Community Survey (ACS) and the Puerto Rico Community
                     Survey (PRCS) ask respondents age 1 year and over whether they lived
                     in the same residence 1 year ago. For people who lived in a different
                     residence, the location of their previous residence is collected.
                     
                     ACS uses a series of monthly samples to produce estimates. The 5-year
                     dataset is used for the county-to-county migration flows since many
                     counties have a population less than 20,000. Multiyear estimates from
                     the American Community Survey (ACS) are "period" estimates derived
                     from a data sample collected over a period of time, as opposed to
                     "point-in-time" estimates such as those from past decennial censuses.
                     ACS 5-year estimate includes data collected over a 60-month period.
                     The date of the data is the end of the 5-year period. For example, a
                     value dated 2014 represents data from 2010 to 2014. However, they do
                     not describe any specific day, month, or year within that time period.
                     
                     Multiyear estimates require some considerations that single-year
                     estimates do not. For example, multiyear estimates released in
                     consecutive years consist mostly of overlapping years and shared data.
                     The 2010-2014 ACS 5-year estimates share sample data from 2011 through
                     2014 with the 2011-2015 ACS 5-year estimates. Because of this overlap,
                     users should use extreme caution in making comparisons with
                     consecutive years of multiyear estimates.
                     
                     Please see "Section 3: Understanding and Using ACS Single-Year and
                     Multiyear Estimates" on publication page 13 (file page 19) of the 2018
                     ACS General Handbook
                     (https://www.census.gov/content/dam/Census/library/publications/2018/acs/acs_general_handbook_2018.pdf)
                     for a more thorough clarification.

DATE         VALUE
2009-01-01     916
2010-01-01    2141
2011-01-01     600
2012-01-01    -189
2013-01-01    -171
2014-01-01    -947
2015-01-01   -1094
2016-01-01   -1999
2017-01-01   -2907
2018-01-01   -2842
2019-01-01   -1781
2020-01-01   -1061