Frequencies for first 10,000 rows of varpsu variable in h170 dataset :

   VARIANCE |
 ESTIMATION |
  PSU, 2014 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      4,544       45.44       45.44
          2 |      4,692       46.92       92.36
          3 |        764        7.64      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 14 Jul 2017