Frequencies for first 10,000 rows of patcode variable in namcs2003 dataset :

    patient |
       code |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        443        4.43        4.43
          2 |        442        4.42        8.85
          3 |        440        4.40       13.25
          4 |        437        4.37       17.62
          5 |        433        4.33       21.95
          6 |        422        4.22       26.17
          7 |        418        4.18       30.35
          8 |        412        4.12       34.47
          9 |        406        4.06       38.53
         10 |        399        3.99       42.52
         11 |        387        3.87       46.39
         12 |        381        3.81       50.20
         13 |        369        3.69       53.89
         14 |        359        3.59       57.48
         15 |        348        3.48       60.96
         16 |        328        3.28       64.24
         17 |        314        3.14       67.38
         18 |        304        3.04       70.42
         19 |        289        2.89       73.31
         20 |        267        2.67       75.98
         21 |        240        2.40       78.38
         22 |        218        2.18       80.56
         23 |        204        2.04       82.60
         24 |        189        1.89       84.49
         25 |        177        1.77       86.26
         26 |        163        1.63       87.89
         27 |        156        1.56       89.45
         28 |        145        1.45       90.90
         29 |        129        1.29       92.19
         30 |        109        1.09       93.28
         31 |         92        0.92       94.20
         32 |         79        0.79       94.99
         33 |         70        0.70       95.69
         34 |         62        0.62       96.31
         35 |         53        0.53       96.84
         36 |         47        0.47       97.31
         37 |         42        0.42       97.73
         38 |         37        0.37       98.10
         39 |         32        0.32       98.42
         40 |         26        0.26       98.68
         41 |         21        0.21       98.89
         42 |         16        0.16       99.05
         43 |         14        0.14       99.19
         44 |         13        0.13       99.32
         45 |          9        0.09       99.41
         46 |          8        0.08       99.49
         47 |          8        0.08       99.57
         48 |          6        0.06       99.63
         49 |          5        0.05       99.68
         50 |          4        0.04       99.72
         51 |          4        0.04       99.76
         52 |          3        0.03       99.79
         53 |          3        0.03       99.82
         54 |          3        0.03       99.85
         55 |          3        0.03       99.88
         56 |          3        0.03       99.91
         57 |          3        0.03       99.94
         58 |          2        0.02       99.96
         59 |          2        0.02       99.98
         60 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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