Frequencies for first 10,000 rows of smsarfip variable in natl1989 dataset :

  FIPS SMSA |
         of |
  Residence |      Freq.     Percent        Cum.
------------+-----------------------------------
       0000 |      4,061       40.61       40.61
       0450 |        294        2.94       43.55
       0520 |          7        0.07       43.62
       0640 |          1        0.01       43.63
       0920 |          2        0.02       43.65
       1000 |      2,315       23.15       66.80
       1560 |          2        0.02       66.82
       1800 |         63        0.63       67.45
       2560 |          1        0.01       67.46
       2650 |        333        3.33       70.79
       2750 |          3        0.03       70.82
       2880 |        212        2.12       72.94
       3000 |          1        0.01       72.95
       3440 |        787        7.87       80.82
       3605 |          1        0.01       80.83
       5000 |          1        0.01       80.84
       5160 |        787        7.87       88.71
       5240 |        729        7.29       96.00
       5483 |          1        0.01       96.01
       5560 |          4        0.04       96.05
       5720 |          1        0.01       96.06
       5790 |          1        0.01       96.07
       5960 |          1        0.01       96.08
       6025 |         13        0.13       96.21
       6080 |          8        0.08       96.29
       8240 |          2        0.02       96.31
       8400 |          1        0.01       96.32
       8600 |        368        3.68      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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