Frequencies for first 10,000 rows of smsares variable in natl1987 dataset :

   Standard |
Metropolita |
          n |
Statistical |
  Area SMSA |
         of |
  residence |      Freq.     Percent        Cum.
------------+-----------------------------------
        000 |      3,644       36.44       36.44
        015 |        389        3.89       40.33
        019 |          2        0.02       40.35
        033 |          2        0.02       40.37
        035 |      1,556       15.56       55.93
        057 |          2        0.02       55.95
        066 |         57        0.57       56.52
        093 |        364        3.64       60.16
        096 |          1        0.01       60.17
        102 |        272        2.72       62.89
        122 |      1,079       10.79       73.68
        127 |          1        0.01       73.69
        173 |          1        0.01       73.70
        175 |          1        0.01       73.71
        177 |      1,600       16.00       89.71
        180 |        741        7.41       97.12
        183 |          1        0.01       97.13
        189 |          1        0.01       97.14
        195 |          1        0.01       97.15
        205 |          2        0.02       97.17
        207 |         11        0.11       97.28
        209 |          3        0.03       97.31
        283 |        268        2.68       99.99
        ZZZ |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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