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

NCHS County |
         of |
  Residence |      Freq.     Percent        Cum.
------------+-----------------------------------
      01008 |        303        3.03        3.03
      01037 |      1,586       15.86       18.89
      01045 |        713        7.13       26.02
      01049 |        850        8.50       34.52
      01051 |        675        6.75       41.27
      01052 |        155        1.55       42.82
      01058 |          7        0.07       42.89
      01059 |          1        0.01       42.90
      01063 |        361        3.61       46.51
      01999 |      5,198       51.98       98.49
      03008 |          1        0.01       98.50
      04999 |          1        0.01       98.51
      05007 |          1        0.01       98.52
      10017 |          3        0.03       98.55
      10027 |          1        0.01       98.56
      10046 |          1        0.01       98.57
      10050 |          1        0.01       98.58
      10053 |          1        0.01       98.59
      10999 |         30        0.30       98.89
      11999 |         21        0.21       99.10
      17999 |          1        0.01       99.11
      24027 |          1        0.01       99.12
      25024 |          6        0.06       99.18
      25030 |         19        0.19       99.37
      25999 |         32        0.32       99.69
      36050 |          1        0.01       99.70
      43075 |          1        0.01       99.71
      43999 |         27        0.27       99.98
      59ZZZ |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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