Frequencies for first 10,000 rows of cstratm variable in namcs2008 dataset :

  clustered |
psu stratum |
   marker - |
     masked |      Freq.     Percent        Cum.
------------+-----------------------------------
   2.01e+07 |        127        1.27        1.27
   2.01e+07 |        283        2.83        4.10
   2.01e+07 |        223        2.23        6.33
   2.01e+07 |        379        3.79       10.12
   2.02e+07 |        366        3.66       13.78
   2.02e+07 |        186        1.86       15.64
   2.02e+07 |        313        3.13       18.77
   2.02e+07 |        217        2.17       20.94
   2.03e+07 |        242        2.42       23.36
   2.03e+07 |        233        2.33       25.69
   2.03e+07 |        390        3.90       29.59
   2.03e+07 |        408        4.08       33.67
   2.04e+07 |        446        4.46       38.13
   2.04e+07 |        264        2.64       40.77
   2.04e+07 |        200        2.00       42.77
   2.04e+07 |        398        3.98       46.75
   4.01e+07 |        989        9.89       56.64
   4.02e+07 |      1,512       15.12       71.76
   4.03e+07 |      2,141       21.41       93.17
   4.04e+07 |        683        6.83      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Mar 2016