Frequencies for first 10,000 rows of psum variable in namcs1994 dataset :

 psu marker |
   (masked) |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      1,437       14.37       14.37
          2 |      1,521       15.21       29.58
          3 |        984        9.84       39.42
          4 |        906        9.06       48.48
          5 |         68        0.68       49.16
          6 |         28        0.28       49.44
          7 |        226        2.26       51.70
          8 |        112        1.12       52.82
          9 |        149        1.49       54.31
         10 |        121        1.21       55.52
         11 |        121        1.21       56.73
         12 |        147        1.47       58.20
         13 |         55        0.55       58.75
         14 |        353        3.53       62.28
         15 |         93        0.93       63.21
         16 |         88        0.88       64.09
         17 |        110        1.10       65.19
         18 |        151        1.51       66.70
         19 |         84        0.84       67.54
         20 |        234        2.34       69.88
         21 |        102        1.02       70.90
         22 |        113        1.13       72.03
         23 |        162        1.62       73.65
         24 |        112        1.12       74.77
         25 |        270        2.70       77.47
         26 |        174        1.74       79.21
         27 |         51        0.51       79.72
         28 |         67        0.67       80.39
         29 |        132        1.32       81.71
         30 |         89        0.89       82.60
         31 |         60        0.60       83.20
         32 |         22        0.22       83.42
         33 |        347        3.47       86.89
         34 |        215        2.15       89.04
         35 |        159        1.59       90.63
         36 |         10        0.10       90.73
         37 |         63        0.63       91.36
         38 |         63        0.63       91.99
         39 |         92        0.92       92.91
         40 |         44        0.44       93.35
         42 |        127        1.27       94.62
         43 |         70        0.70       95.32
         44 |         16        0.16       95.48
         45 |         67        0.67       96.15
         46 |         54        0.54       96.69
         47 |         78        0.78       97.47
         48 |         91        0.91       98.38
         49 |        162        1.62      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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