Frequencies for first 10,000 rows of cntyres variable in natl1999 dataset :

NCHS County |
         of |
  Residence |      Freq.     Percent        Cum.
------------+-----------------------------------
      01008 |        263        2.63        2.63
      01037 |      1,512       15.12       17.75
      01045 |        673        6.73       24.48
      01049 |      1,004       10.04       34.52
      01051 |        622        6.22       40.74
      01052 |        278        2.78       43.52
      01063 |        402        4.02       47.54
      01999 |      5,105       51.05       98.59
      10003 |          1        0.01       98.60
      10017 |          1        0.01       98.61
      10046 |          1        0.01       98.62
      10999 |         24        0.24       98.86
      11011 |          1        0.01       98.87
      11033 |          1        0.01       98.88
      11106 |          3        0.03       98.91
      11999 |         24        0.24       99.15
      19037 |          1        0.01       99.16
      19052 |          1        0.01       99.17
      25024 |          4        0.04       99.21
      25030 |         13        0.13       99.34
      25999 |         22        0.22       99.56
      36999 |          4        0.04       99.60
      43999 |         38        0.38       99.98
      44020 |          1        0.01       99.99
      44999 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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