Frequencies for first 10,000 rows of smsarfip variable in natl1994 dataset :

  FIPS SMSA |
         of |
  Residence |      Freq.     Percent        Cum.
------------+-----------------------------------
       0000 |      3,321       33.21       33.21
       0450 |        303        3.03       36.24
       0920 |         25        0.25       36.49
       1000 |      2,082       20.82       57.31
       1800 |         89        0.89       58.20
       2030 |        207        2.07       60.27
       2180 |        356        3.56       63.83
       2650 |        274        2.74       66.57
       2750 |          1        0.01       66.58
       3440 |        849        8.49       75.07
       3980 |          1        0.01       75.08
       5120 |          1        0.01       75.09
       5160 |      1,066       10.66       85.75
       5240 |        919        9.19       94.94
       5360 |          1        0.01       94.95
       5775 |          1        0.01       94.96
       6080 |          4        0.04       95.00
       6200 |          1        0.01       95.01
       8280 |          1        0.01       95.02
       8600 |        361        3.61       98.63
       8960 |          1        0.01       98.64
       9320 |          1        0.01       98.65
       9999 |        135        1.35      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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