Frequencies for first 10,000 rows of smsarfip variable in natl1985 dataset :

  FIPS SMSA |
         of |
  Residence |      Freq.     Percent        Cum.
------------+-----------------------------------
       0000 |      4,004       40.04       40.04
       0450 |        389        3.89       43.93
       0520 |          2        0.02       43.95
       1000 |      1,781       17.81       61.76
       1560 |          7        0.07       61.83
       1800 |         37        0.37       62.20
       2650 |        393        3.93       66.13
       2700 |          1        0.01       66.14
       2750 |          3        0.03       66.17
       2880 |        274        2.74       68.91
       3360 |          1        0.01       68.92
       3440 |        956        9.56       78.48
       3920 |          1        0.01       78.49
       4680 |          1        0.01       78.50
       5000 |          2        0.02       78.52
       5160 |      1,478       14.78       93.30
       5240 |        539        5.39       98.69
       5560 |          1        0.01       98.70
       5960 |          1        0.01       98.71
       6025 |         10        0.10       98.81
       6080 |         10        0.10       98.91
       7240 |          1        0.01       98.92
       8600 |        108        1.08      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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