Frequencies for first 10,000 rows of psum variable in namcs1993 dataset :

 psu marker |
   (masked) |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      1,425       14.25       14.25
          2 |      1,132       11.32       25.57
          3 |        962        9.62       35.19
          4 |      1,038       10.38       45.57
          6 |         59        0.59       46.16
          7 |        208        2.08       48.24
          8 |        193        1.93       50.17
          9 |        153        1.53       51.70
         10 |        176        1.76       53.46
         11 |        180        1.80       55.26
         12 |         85        0.85       56.11
         13 |         62        0.62       56.73
         14 |        496        4.96       61.69
         15 |         84        0.84       62.53
         16 |        122        1.22       63.75
         17 |         59        0.59       64.34
         18 |        175        1.75       66.09
         20 |        240        2.40       68.49
         21 |        143        1.43       69.92
         22 |        160        1.60       71.52
         23 |         70        0.70       72.22
         24 |         60        0.60       72.82
         25 |        320        3.20       76.02
         26 |         65        0.65       76.67
         27 |         56        0.56       77.23
         28 |         63        0.63       77.86
         29 |        177        1.77       79.63
         30 |        192        1.92       81.55
         31 |         42        0.42       81.97
         33 |        260        2.60       84.57
         34 |        134        1.34       85.91
         35 |        195        1.95       87.86
         36 |         79        0.79       88.65
         37 |        182        1.82       90.47
         38 |         50        0.50       90.97
         39 |        162        1.62       92.59
         40 |        125        1.25       93.84
         41 |        169        1.69       95.53
         42 |         54        0.54       96.07
         43 |         89        0.89       96.96
         44 |         27        0.27       97.23
         45 |         39        0.39       97.62
         46 |         18        0.18       97.80
         47 |         86        0.86       98.66
         48 |         74        0.74       99.40
         49 |         60        0.60      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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