Frequencies for first 10,000 rows of psum variable in namcs2002 dataset :

 PSU marker |
   (masked) |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      1,375       13.75       13.75
          2 |      1,020       10.20       23.95
          3 |        664        6.64       30.59
          4 |      1,382       13.82       44.41
          5 |         90        0.90       45.31
          6 |        162        1.62       46.93
          7 |         88        0.88       47.81
          8 |        205        2.05       49.86
          9 |         90        0.90       50.76
         10 |        176        1.76       52.52
         11 |        236        2.36       54.88
         12 |        193        1.93       56.81
         13 |         28        0.28       57.09
         14 |         52        0.52       57.61
         15 |        104        1.04       58.65
         16 |        300        3.00       61.65
         17 |        200        2.00       63.65
         18 |        143        1.43       65.08
         20 |        117        1.17       66.25
         21 |        196        1.96       68.21
         22 |        155        1.55       69.76
         23 |        373        3.73       73.49
         24 |         78        0.78       74.27
         25 |         51        0.51       74.78
         26 |         85        0.85       75.63
         27 |        136        1.36       76.99
         28 |        195        1.95       78.94
         29 |        206        2.06       81.00
         30 |        211        2.11       83.11
         31 |        103        1.03       84.14
         32 |         62        0.62       84.76
         33 |         36        0.36       85.12
         34 |         34        0.34       85.46
         35 |        131        1.31       86.77
         37 |        130        1.30       88.07
         38 |        204        2.04       90.11
         39 |         94        0.94       91.05
         40 |         92        0.92       91.97
         41 |        100        1.00       92.97
         42 |        234        2.34       95.31
         43 |         31        0.31       95.62
         44 |        158        1.58       97.20
         45 |        138        1.38       98.58
         46 |        142        1.42      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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