Frequencies for first 10,000 rows of cntyres variable in natl1996 dataset :

NCHS County |
         of |
  Residence |      Freq.     Percent        Cum.
------------+-----------------------------------
      01008 |        295        2.95        2.95
      01037 |      1,562       15.62       18.57
      01045 |        703        7.03       25.60
      01049 |      1,000       10.00       35.60
      01051 |        627        6.27       41.87
      01052 |        197        1.97       43.84
      01063 |        300        3.00       46.84
      01999 |      5,144       51.44       98.28
      05019 |          2        0.02       98.30
      10003 |          1        0.01       98.31
      10013 |          1        0.01       98.32
      10016 |          1        0.01       98.33
      10017 |          2        0.02       98.35
      10046 |          2        0.02       98.37
      10999 |         20        0.20       98.57
      11044 |          2        0.02       98.59
      11106 |          2        0.02       98.61
      11121 |          1        0.01       98.62
      11999 |         17        0.17       98.79
      14016 |          1        0.01       98.80
      14022 |          1        0.01       98.81
      19052 |          1        0.01       98.82
      23082 |          2        0.02       98.84
      25024 |          6        0.06       98.90
      25030 |         32        0.32       99.22
      25999 |         29        0.29       99.51
      32999 |          1        0.01       99.52
      33048 |          1        0.01       99.53
      41043 |          1        0.01       99.54
      43019 |          1        0.01       99.55
      43063 |          1        0.01       99.56
      43079 |          1        0.01       99.57
      43999 |         42        0.42       99.99
      44014 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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