_dta:
  1.  zipcode1990 set up by Jean Roth , jroth@nber.org , 30 Mar 2016
  2.  Source Page: http://www.census.gov/geo/maps-data/data/gazetteer1990.html
  3.  Source File URL: http://www2.census.gov/geo/docs/maps-data/data/gazetteer/zips.zip
  4.  Source File: zipcode.csv

  obs:        29,470                          
 vars:             8                          30 Mar 2016 17:30
 size:     1,178,800                          (_dta has notes)
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              storage   display    value
variable name   type    format     label      variable label
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fipsst          str2    %9s                   FIPS State Code
zipcode         long    %8.0g                 
stabbr          str2    %9s                   State Abbreviation
zipcodename     str16   %16s                  ZIP Code Name
lon             float   %9.0g                 Longitude
lat             float   %9.0g                 Latitude
pop1990         long    %12.0g                1990 Population
alloc           float   %9.0g                 Allocation Factor (decimal portion of state within zipcode)
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Sorted by: zipcode  fipsst