Frequencies for first 10,000 rows of cstratm variable in namcs2014 dataset :

     Masked |
   sampling |
    stratum |
 from which |
   provider |
        was |
   selected |      Freq.     Percent        Cum.
------------+-----------------------------------
   1.01e+07 |      1,007       10.07       10.07
   1.01e+07 |      1,374       13.74       23.81
   1.02e+07 |        923        9.23       33.04
   1.02e+07 |        738        7.38       40.42
   1.03e+07 |        705        7.05       47.47
   1.03e+07 |        646        6.46       53.93
   1.04e+07 |        651        6.51       60.44
   1.04e+07 |      1,039       10.39       70.83
   1.05e+07 |      1,282       12.82       83.65
   1.05e+07 |        966        9.66       93.31
   1.06e+07 |        357        3.57       96.88
   1.06e+07 |         15        0.15       97.03
   1.11e+07 |         17        0.17       97.20
   1.11e+07 |          3        0.03       97.23
   1.13e+07 |         21        0.21       97.44
   1.15e+07 |         22        0.22       97.66
   1.18e+07 |         31        0.31       97.97
   1.19e+07 |         21        0.21       98.18
   1.21e+07 |         40        0.40       98.58
   1.21e+07 |         15        0.15       98.73
   1.24e+07 |        127        1.27      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 27 Mar 2017