Frequencies for first 10,000 rows of smsarfip variable in natl1991 dataset :

  FIPS SMSA |
         of |
  Residence |      Freq.     Percent        Cum.
------------+-----------------------------------
       0000 |      3,203       32.03       32.03
       0160 |          1        0.01       32.04
       0360 |          1        0.01       32.05
       0450 |        379        3.79       35.84
       0520 |          2        0.02       35.86
       0600 |          1        0.01       35.87
       0920 |          1        0.01       35.88
       1000 |      2,649       26.49       62.37
       1800 |         42        0.42       62.79
       2030 |        399        3.99       66.78
       2180 |        419        4.19       70.97
       2650 |        306        3.06       74.03
       2750 |          1        0.01       74.04
       2800 |          1        0.01       74.05
       3320 |          1        0.01       74.06
       3440 |        783        7.83       81.89
       3980 |          2        0.02       81.91
       4200 |          1        0.01       81.92
       4520 |          1        0.01       81.93
       5160 |        385        3.85       85.78
       5240 |        950        9.50       95.28
       5360 |          2        0.02       95.30
       5720 |          1        0.01       95.31
       6015 |          1        0.01       95.32
       6025 |          2        0.02       95.34
       6080 |          4        0.04       95.38
       7520 |          1        0.01       95.39
       8600 |        224        2.24       97.63
       9999 |        237        2.37      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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