Frequencies for first 10,000 rows of psum variable in namcs1997 dataset :

 psu marker |
   (masked) |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      1,377       13.77       13.77
          2 |      1,014       10.14       23.91
          3 |      1,197       11.97       35.88
          4 |      1,228       12.28       48.16
          5 |         61        0.61       48.77
          6 |         22        0.22       48.99
          7 |        155        1.55       50.54
          8 |        171        1.71       52.25
          9 |         78        0.78       53.03
         10 |        209        2.09       55.12
         11 |        204        2.04       57.16
         12 |         81        0.81       57.97
         13 |        178        1.78       59.75
         14 |         64        0.64       60.39
         15 |         77        0.77       61.16
         16 |        237        2.37       63.53
         17 |        162        1.62       65.15
         18 |         92        0.92       66.07
         19 |         51        0.51       66.58
         20 |        174        1.74       68.32
         21 |         95        0.95       69.27
         22 |        116        1.16       70.43
         23 |        186        1.86       72.29
         24 |         67        0.67       72.96
         25 |         38        0.38       73.34
         26 |        239        2.39       75.73
         27 |         77        0.77       76.50
         28 |        109        1.09       77.59
         29 |        222        2.22       79.81
         30 |        105        1.05       80.86
         31 |         96        0.96       81.82
         32 |         52        0.52       82.34
         33 |        105        1.05       83.39
         34 |         29        0.29       83.68
         35 |        171        1.71       85.39
         36 |        245        2.45       87.84
         37 |        138        1.38       89.22
         38 |        148        1.48       90.70
         39 |        105        1.05       91.75
         40 |         73        0.73       92.48
         41 |         48        0.48       92.96
         42 |        118        1.18       94.14
         43 |        102        1.02       95.16
         44 |        247        2.47       97.63
         45 |         23        0.23       97.86
         46 |        214        2.14      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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