Frequencies for first 10,000 rows of psum variable in namcs2000 dataset :

 psu marker |
   (masked) |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      1,289       12.89       12.89
          2 |        959        9.59       22.48
          3 |        816        8.16       30.64
          4 |      1,398       13.98       44.62
          5 |        148        1.48       46.10
          7 |        273        2.73       48.83
          8 |        258        2.58       51.41
          9 |        161        1.61       53.02
         10 |        162        1.62       54.64
         11 |        169        1.69       56.33
         12 |         84        0.84       57.17
         13 |         93        0.93       58.10
         14 |        209        2.09       60.19
         15 |        199        1.99       62.18
         16 |        101        1.01       63.19
         17 |         81        0.81       64.00
         18 |         24        0.24       64.24
         19 |        109        1.09       65.33
         20 |        203        2.03       67.36
         21 |        179        1.79       69.15
         22 |        201        2.01       71.16
         23 |        127        1.27       72.43
         24 |         16        0.16       72.59
         25 |         42        0.42       73.01
         26 |         92        0.92       73.93
         27 |         88        0.88       74.81
         28 |        341        3.41       78.22
         29 |        104        1.04       79.26
         30 |        144        1.44       80.70
         31 |        156        1.56       82.26
         32 |         92        0.92       83.18
         33 |         60        0.60       83.78
         34 |         17        0.17       83.95
         35 |         98        0.98       84.93
         36 |        328        3.28       88.21
         37 |         38        0.38       88.59
         38 |         79        0.79       89.38
         39 |         66        0.66       90.04
         40 |        190        1.90       91.94
         41 |        117        1.17       93.11
         42 |         77        0.77       93.88
         43 |        181        1.81       95.69
         44 |        237        2.37       98.06
         45 |        102        1.02       99.08
         46 |         92        0.92      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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