Frequencies for first 10,000 rows of smsares variable in natl1988 dataset :

   Standard |
Metropolita |
          n |
Statistical |
  Area SMSA |
         of |
  residence |      Freq.     Percent        Cum.
------------+-----------------------------------
        000 |      4,394       43.94       43.94
        004 |          1        0.01       43.95
        015 |        262        2.62       46.57
        018 |          1        0.01       46.58
        019 |          4        0.04       46.62
        033 |          4        0.04       46.66
        035 |      1,518       15.18       61.84
        057 |          2        0.02       61.86
        065 |          2        0.02       61.88
        066 |         63        0.63       62.51
        072 |          1        0.01       62.52
        093 |        355        3.55       66.07
        102 |        236        2.36       68.43
        122 |        639        6.39       74.82
        128 |          1        0.01       74.83
        161 |          1        0.01       74.84
        165 |          2        0.02       74.86
        171 |          1        0.01       74.87
        177 |      1,030       10.30       85.17
        180 |      1,124       11.24       96.41
        189 |          1        0.01       96.42
        190 |          1        0.01       96.43
        205 |          3        0.03       96.46
        207 |          8        0.08       96.54
        209 |          5        0.05       96.59
        214 |          2        0.02       96.61
        275 |          2        0.02       96.63
        283 |        337        3.37      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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