Frequencies for first 10,000 rows of cstratm variable in namcs2007 dataset :

  clustered |
psu stratum |
   marker - |
     masked |      Freq.     Percent        Cum.
------------+-----------------------------------
   2.01e+07 |        146        1.46        1.46
   2.01e+07 |        239        2.39        3.85
   2.01e+07 |        236        2.36        6.21
   2.01e+07 |        294        2.94        9.15
   2.02e+07 |        360        3.60       12.75
   2.02e+07 |        284        2.84       15.59
   2.02e+07 |        225        2.25       17.84
   2.02e+07 |        252        2.52       20.36
   2.03e+07 |        412        4.12       24.48
   2.03e+07 |        232        2.32       26.80
   2.03e+07 |        205        2.05       28.85
   2.03e+07 |        568        5.68       34.53
   2.04e+07 |        473        4.73       39.26
   2.04e+07 |        116        1.16       40.42
   2.04e+07 |        121        1.21       41.63
   2.04e+07 |         36        0.36       41.99
   4.01e+07 |        862        8.62       50.61
   4.02e+07 |      1,846       18.46       69.07
   4.03e+07 |      2,477       24.77       93.84
   4.04e+07 |        616        6.16      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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