Frequencies for first 10,000 rows of smsarfip variable in natl1982 dataset :

  FIPS SMSA |
         of |
  Residence |      Freq.     Percent        Cum.
------------+-----------------------------------
       0000 |      3,998       39.98       39.98
       0450 |        353        3.53       43.51
       0600 |          1        0.01       43.52
       0720 |          1        0.01       43.53
       0840 |          1        0.01       43.54
       1000 |      2,035       20.35       63.89
       1440 |          1        0.01       63.90
       1560 |         12        0.12       64.02
       1660 |          1        0.01       64.03
       1800 |         44        0.44       64.47
       2000 |          1        0.01       64.48
       2160 |          1        0.01       64.49
       2650 |        358        3.58       68.07
       2680 |          1        0.01       68.08
       2750 |          2        0.02       68.10
       2880 |        274        2.74       70.84
       3440 |        803        8.03       78.87
       3660 |          1        0.01       78.88
       5160 |      1,534       15.34       94.22
       5240 |        300        3.00       97.22
       5360 |          1        0.01       97.23
       6015 |          1        0.01       97.24
       6025 |          9        0.09       97.33
       6080 |         19        0.19       97.52
       6280 |          1        0.01       97.53
       7480 |          1        0.01       97.54
       8600 |        246        2.46      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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