Frequencies for first 10,000 rows of smsarfip variable in natlterr1999 dataset :

       FIPS |
PMSA/MSA of |
  Residence |      Freq.     Percent        Cum.
------------+-----------------------------------
       0000 |      1,685       16.85       16.85
       0060 |        357        3.57       20.42
       0470 |        432        4.32       24.74
       1310 |        806        8.06       32.80
       4840 |        621        6.21       39.01
       6360 |      1,022       10.22       49.23
       7440 |      5,077       50.77      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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