Frequencies for first 10,000 rows of psum variable in namcs1996 dataset :

 psu marker |
   (masked) |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      1,050       10.50       10.50
          2 |      1,086       10.86       21.36
          3 |      1,005       10.05       31.41
          4 |      1,549       15.49       46.90
          5 |        132        1.32       48.22
          6 |          9        0.09       48.31
          7 |        251        2.51       50.82
          8 |        222        2.22       53.04
          9 |         98        0.98       54.02
         10 |        178        1.78       55.80
         11 |         28        0.28       56.08
         12 |         26        0.26       56.34
         13 |         65        0.65       56.99
         14 |        197        1.97       58.96
         15 |        191        1.91       60.87
         16 |        139        1.39       62.26
         17 |        152        1.52       63.78
         18 |        187        1.87       65.65
         19 |         35        0.35       66.00
         20 |        225        2.25       68.25
         21 |         47        0.47       68.72
         22 |        127        1.27       69.99
         23 |        124        1.24       71.23
         24 |         87        0.87       72.10
         25 |        263        2.63       74.73
         26 |        200        2.00       76.73
         27 |         68        0.68       77.41
         28 |        177        1.77       79.18
         29 |        121        1.21       80.39
         30 |         69        0.69       81.08
         31 |         31        0.31       81.39
         32 |         26        0.26       81.65
         33 |        150        1.50       83.15
         34 |        141        1.41       84.56
         35 |        132        1.32       85.88
         36 |        164        1.64       87.52
         37 |        260        2.60       90.12
         38 |         27        0.27       90.39
         39 |        103        1.03       91.42
         40 |         44        0.44       91.86
         41 |         82        0.82       92.68
         42 |         84        0.84       93.52
         43 |         79        0.79       94.31
         44 |        137        1.37       95.68
         45 |         86        0.86       96.54
         46 |         20        0.20       96.74
         47 |        104        1.04       97.78
         48 |         59        0.59       98.37
         49 |        163        1.63      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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