Frequencies for first 10,000 rows of smsares variable in natl1980 dataset :

   Standard |
Metropolita |
          n |
Statistical |
  Area SMSA |
         of |
  residence |      Freq.     Percent        Cum.
------------+-----------------------------------
        000 |      4,074       40.74       40.74
        010 |          1        0.01       40.75
        015 |        339        3.39       44.14
        019 |          4        0.04       44.18
        024 |          1        0.01       44.19
        035 |      2,239       22.39       66.58
        054 |          1        0.01       66.59
        057 |         20        0.20       66.79
        058 |          1        0.01       66.80
        061 |          1        0.01       66.81
        066 |         56        0.56       67.37
        067 |          1        0.01       67.38
        093 |        420        4.20       71.58
        099 |          2        0.02       71.60
        102 |        265        2.65       74.25
        122 |        801        8.01       82.26
        173 |          1        0.01       82.27
        177 |        800        8.00       90.27
        180 |        692        6.92       97.19
        202 |          1        0.01       97.20
        207 |          1        0.01       97.21
        209 |         13        0.13       97.34
        225 |          1        0.01       97.35
        231 |          1        0.01       97.36
        256 |          1        0.01       97.37
        283 |        261        2.61       99.98
        291 |          1        0.01       99.99
        ZZZ |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 3 Jan 2016