Frequencies for first 10,000 rows of smsares variable in natl1990 dataset :

PSMA/MSA of |
  Residence |      Freq.     Percent        Cum.
------------+-----------------------------------
        000 |      3,332       33.32       33.32
        015 |        233        2.33       35.65
        019 |          4        0.04       35.69
        021 |          1        0.01       35.70
        025 |          1        0.01       35.71
        035 |          2        0.02       35.73
        037 |      2,410       24.10       59.83
        071 |         35        0.35       60.18
        080 |        265        2.65       62.83
        085 |        386        3.86       66.69
        089 |          2        0.02       66.71
        100 |        324        3.24       69.95
        104 |          1        0.01       69.96
        107 |          1        0.01       69.97
        132 |        851        8.51       78.48
        138 |          2        0.02       78.50
        155 |          1        0.01       78.51
        192 |        534        5.34       83.85
        194 |          1        0.01       83.86
        196 |      1,107       11.07       94.93
        220 |          2        0.02       94.95
        222 |          3        0.03       94.98
        223 |          2        0.02       95.00
        254 |          1        0.01       95.01
        269 |          1        0.01       95.02
        295 |          1        0.01       95.03
        296 |        269        2.69       97.72
        305 |          1        0.01       97.73
        309 |          1        0.01       97.74
        310 |          1        0.01       97.75
        314 |          1        0.01       97.76
        999 |        222        2.22       99.98
        ZZZ |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Dec 2015