Frequencies for first 10,000 rows of patcode variable in namcs2004 dataset :

    patient |
       code |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        439        4.39        4.39
          2 |        438        4.38        8.77
          3 |        435        4.35       13.12
          4 |        431        4.31       17.43
          5 |        428        4.28       21.71
          6 |        420        4.20       25.91
          7 |        416        4.16       30.07
          8 |        411        4.11       34.18
          9 |        401        4.01       38.19
         10 |        393        3.93       42.12
         11 |        379        3.79       45.91
         12 |        368        3.68       49.59
         13 |        355        3.55       53.14
         14 |        347        3.47       56.61
         15 |        333        3.33       59.94
         16 |        327        3.27       63.21
         17 |        310        3.10       66.31
         18 |        296        2.96       69.27
         19 |        283        2.83       72.10
         20 |        274        2.74       74.84
         21 |        256        2.56       77.40
         22 |        239        2.39       79.79
         23 |        216        2.16       81.95
         24 |        201        2.01       83.96
         25 |        186        1.86       85.82
         26 |        170        1.70       87.52
         27 |        157        1.57       89.09
         28 |        147        1.47       90.56
         29 |        133        1.33       91.89
         30 |        122        1.22       93.11
         31 |        102        1.02       94.13
         32 |         88        0.88       95.01
         33 |         76        0.76       95.77
         34 |         65        0.65       96.42
         35 |         58        0.58       97.00
         36 |         51        0.51       97.51
         37 |         45        0.45       97.96
         38 |         34        0.34       98.30
         39 |         32        0.32       98.62
         40 |         28        0.28       98.90
         41 |         22        0.22       99.12
         42 |         18        0.18       99.30
         43 |         15        0.15       99.45
         44 |         11        0.11       99.56
         45 |         10        0.10       99.66
         46 |          9        0.09       99.75
         47 |          7        0.07       99.82
         48 |          6        0.06       99.88
         49 |          5        0.05       99.93
         50 |          4        0.04       99.97
         51 |          1        0.01       99.98
         52 |          1        0.01       99.99
         53 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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