Frequencies for first 10,000 rows of psum variable in namcs2001 dataset :

 psu marker |
   (masked) |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      1,856       18.56       18.56
          2 |        932        9.32       27.88
          3 |        908        9.08       36.96
          4 |      1,189       11.89       48.85
          5 |         54        0.54       49.39
          6 |        119        1.19       50.58
          7 |        135        1.35       51.93
          9 |        126        1.26       53.19
         10 |        124        1.24       54.43
         11 |        151        1.51       55.94
         12 |        175        1.75       57.69
         13 |        122        1.22       58.91
         14 |         43        0.43       59.34
         15 |        232        2.32       61.66
         16 |        317        3.17       64.83
         17 |        169        1.69       66.52
         18 |        100        1.00       67.52
         20 |        214        2.14       69.66
         21 |        112        1.12       70.78
         22 |        227        2.27       73.05
         23 |         92        0.92       73.97
         24 |         94        0.94       74.91
         25 |         76        0.76       75.67
         26 |        122        1.22       76.89
         28 |        366        3.66       80.55
         29 |        263        2.63       83.18
         30 |        184        1.84       85.02
         31 |         51        0.51       85.53
         32 |         48        0.48       86.01
         33 |         65        0.65       86.66
         34 |         31        0.31       86.97
         35 |        110        1.10       88.07
         37 |        159        1.59       89.66
         38 |        134        1.34       91.00
         39 |         91        0.91       91.91
         40 |        161        1.61       93.52
         41 |         54        0.54       94.06
         42 |         77        0.77       94.83
         44 |        223        2.23       97.06
         45 |         29        0.29       97.35
         46 |        265        2.65      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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