Frequencies for first 10,000 rows of smsarfip variable in natl1986 dataset :

  FIPS SMSA |
         of |
  Residence |      Freq.     Percent        Cum.
------------+-----------------------------------
       0000 |      3,938       39.38       39.38
       0450 |        377        3.77       43.15
       0520 |          2        0.02       43.17
       1000 |      1,942       19.42       62.59
       1140 |          1        0.01       62.60
       1560 |          3        0.03       62.63
       1600 |          1        0.01       62.64
       1680 |          1        0.01       62.65
       1800 |         42        0.42       63.07
       2650 |        422        4.22       67.29
       2880 |        291        2.91       70.20
       3440 |        919        9.19       79.39
       3600 |          1        0.01       79.40
       3605 |          2        0.02       79.42
       5160 |      1,444       14.44       93.86
       5240 |        478        4.78       98.64
       6025 |          9        0.09       98.73
       6080 |         10        0.10       98.83
       7840 |          1        0.01       98.84
       8280 |          1        0.01       98.85
       8600 |        115        1.15      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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