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Codebook for NHGIS data file 'nhgis1270_ds239_20185_nation'
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Contents
    - Data Summary
    - Data Dictionary
    - Citation and Use
 
Additional documentation on NHGIS data sources is available at: 
    https://www.nhgis.org/documentation/tabular-data 
 
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Data Summary
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Year:             2014-2018
Geographic level: Nation
Dataset:          2018 American Community Survey: 5-Year Data [2014-2018, Block Groups & Larger Areas]
   NHGIS code:    2014_2018_ACS5a
   NHGIS ID:      ds239
Breakdown(s):     Geographic Subarea:
                     Total area (00)
Data type(s):     (E) Estimates
                  (M) Margins of error
 
Tables:
 
1. Sex by Age
   Universe:    Total population
   Source code: B01001
   NHGIS code:  AJWB
 
2. Median Age by Sex
   Universe:    Total population
   Source code: B01002
   NHGIS code:  AJWC
 
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Data Dictionary
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Context Fields 
        GISJOIN:     GIS Join Match Code
        YEAR:        Data File Year
        STUSAB:      State Postal Abbreviation
        NATION:      Nation Name
        NATIONA:     Nation Code
        AIHHTLI:     American Indian Trust Land/ Hawaiian Home Land Indicator
        PCI:         Principal City Indicator
        GEOID:       Census Geographic Identifier
 
Data Type (E):
    Estimates
 
        NAME_E:      Area Name
 
    Table 1:     Sex by Age
    Universe:    Total population
    Source code: B01001
    NHGIS code:  AJWB
        AJWBE001:    Total
        AJWBE002:    Male
        AJWBE003:    Male: Under 5 years
        AJWBE004:    Male: 5 to 9 years
        AJWBE005:    Male: 10 to 14 years
        AJWBE006:    Male: 15 to 17 years
        AJWBE007:    Male: 18 and 19 years
        AJWBE008:    Male: 20 years
        AJWBE009:    Male: 21 years
        AJWBE010:    Male: 22 to 24 years
        AJWBE011:    Male: 25 to 29 years
        AJWBE012:    Male: 30 to 34 years
        AJWBE013:    Male: 35 to 39 years
        AJWBE014:    Male: 40 to 44 years
        AJWBE015:    Male: 45 to 49 years
        AJWBE016:    Male: 50 to 54 years
        AJWBE017:    Male: 55 to 59 years
        AJWBE018:    Male: 60 and 61 years
        AJWBE019:    Male: 62 to 64 years
        AJWBE020:    Male: 65 and 66 years
        AJWBE021:    Male: 67 to 69 years
        AJWBE022:    Male: 70 to 74 years
        AJWBE023:    Male: 75 to 79 years
        AJWBE024:    Male: 80 to 84 years
        AJWBE025:    Male: 85 years and over
        AJWBE026:    Female
        AJWBE027:    Female: Under 5 years
        AJWBE028:    Female: 5 to 9 years
        AJWBE029:    Female: 10 to 14 years
        AJWBE030:    Female: 15 to 17 years
        AJWBE031:    Female: 18 and 19 years
        AJWBE032:    Female: 20 years
        AJWBE033:    Female: 21 years
        AJWBE034:    Female: 22 to 24 years
        AJWBE035:    Female: 25 to 29 years
        AJWBE036:    Female: 30 to 34 years
        AJWBE037:    Female: 35 to 39 years
        AJWBE038:    Female: 40 to 44 years
        AJWBE039:    Female: 45 to 49 years
        AJWBE040:    Female: 50 to 54 years
        AJWBE041:    Female: 55 to 59 years
        AJWBE042:    Female: 60 and 61 years
        AJWBE043:    Female: 62 to 64 years
        AJWBE044:    Female: 65 and 66 years
        AJWBE045:    Female: 67 to 69 years
        AJWBE046:    Female: 70 to 74 years
        AJWBE047:    Female: 75 to 79 years
        AJWBE048:    Female: 80 to 84 years
        AJWBE049:    Female: 85 years and over
 
    Table 2:     Median Age by Sex
    Universe:    Total population
    Source code: B01002
    NHGIS code:  AJWC
        AJWCE001:    Median age: Total
        AJWCE002:    Median age: Male
        AJWCE003:    Median age: Female
 
Data Type (M):
    Margins of error
 
        NAME_M:      Area Name
 
    Table 1:     Sex by Age
    Universe:    Total population
    Source code: B01001
    NHGIS code:  AJWB
        AJWBM001:    Total
        AJWBM002:    Male
        AJWBM003:    Male: Under 5 years
        AJWBM004:    Male: 5 to 9 years
        AJWBM005:    Male: 10 to 14 years
        AJWBM006:    Male: 15 to 17 years
        AJWBM007:    Male: 18 and 19 years
        AJWBM008:    Male: 20 years
        AJWBM009:    Male: 21 years
        AJWBM010:    Male: 22 to 24 years
        AJWBM011:    Male: 25 to 29 years
        AJWBM012:    Male: 30 to 34 years
        AJWBM013:    Male: 35 to 39 years
        AJWBM014:    Male: 40 to 44 years
        AJWBM015:    Male: 45 to 49 years
        AJWBM016:    Male: 50 to 54 years
        AJWBM017:    Male: 55 to 59 years
        AJWBM018:    Male: 60 and 61 years
        AJWBM019:    Male: 62 to 64 years
        AJWBM020:    Male: 65 and 66 years
        AJWBM021:    Male: 67 to 69 years
        AJWBM022:    Male: 70 to 74 years
        AJWBM023:    Male: 75 to 79 years
        AJWBM024:    Male: 80 to 84 years
        AJWBM025:    Male: 85 years and over
        AJWBM026:    Female
        AJWBM027:    Female: Under 5 years
        AJWBM028:    Female: 5 to 9 years
        AJWBM029:    Female: 10 to 14 years
        AJWBM030:    Female: 15 to 17 years
        AJWBM031:    Female: 18 and 19 years
        AJWBM032:    Female: 20 years
        AJWBM033:    Female: 21 years
        AJWBM034:    Female: 22 to 24 years
        AJWBM035:    Female: 25 to 29 years
        AJWBM036:    Female: 30 to 34 years
        AJWBM037:    Female: 35 to 39 years
        AJWBM038:    Female: 40 to 44 years
        AJWBM039:    Female: 45 to 49 years
        AJWBM040:    Female: 50 to 54 years
        AJWBM041:    Female: 55 to 59 years
        AJWBM042:    Female: 60 and 61 years
        AJWBM043:    Female: 62 to 64 years
        AJWBM044:    Female: 65 and 66 years
        AJWBM045:    Female: 67 to 69 years
        AJWBM046:    Female: 70 to 74 years
        AJWBM047:    Female: 75 to 79 years
        AJWBM048:    Female: 80 to 84 years
        AJWBM049:    Female: 85 years and over
 
    Table 2:     Median Age by Sex
    Universe:    Total population
    Source code: B01002
    NHGIS code:  AJWC
        AJWCM001:    Median age: Total
        AJWCM002:    Median age: Male
        AJWCM003:    Median age: Female
 
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Citation and Use of NHGIS Data
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        Steven Manson, Jonathan Schroeder, David Van Riper, Tracy Kugler, and Steven Ruggles. 
        IPUMS National Historical Geographic Information System: Version 17.0 
        [dataset]. Minneapolis, MN: IPUMS. 2022. 
        http://doi.org/10.18128/D050.V17.0

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