Frequencies for first 10,000 rows of patcode variable in namcs2007 dataset :

    patient |
       code |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        364        3.64        3.64
          2 |        364        3.64        7.28
          3 |        363        3.63       10.91
          4 |        362        3.62       14.53
          5 |        360        3.60       18.13
          6 |        360        3.60       21.73
          7 |        358        3.58       25.31
          8 |        356        3.56       28.87
          9 |        353        3.53       32.40
         10 |        350        3.50       35.90
         11 |        347        3.47       39.37
         12 |        341        3.41       42.78
         13 |        336        3.36       46.14
         14 |        334        3.34       49.48
         15 |        328        3.28       52.76
         16 |        320        3.20       55.96
         17 |        317        3.17       59.13
         18 |        311        3.11       62.24
         19 |        306        3.06       65.30
         20 |        297        2.97       68.27
         21 |        282        2.82       71.09
         22 |        273        2.73       73.82
         23 |        264        2.64       76.46
         24 |        253        2.53       78.99
         25 |        242        2.42       81.41
         26 |        218        2.18       83.59
         27 |        206        2.06       85.65
         28 |        191        1.91       87.56
         29 |        168        1.68       89.24
         30 |        158        1.58       90.82
         31 |        137        1.37       92.19
         32 |        122        1.22       93.41
         33 |        107        1.07       94.48
         34 |         96        0.96       95.44
         35 |         84        0.84       96.28
         36 |         67        0.67       96.95
         37 |         56        0.56       97.51
         38 |         47        0.47       97.98
         39 |         34        0.34       98.32
         40 |         24        0.24       98.56
         41 |         21        0.21       98.77
         42 |         18        0.18       98.95
         43 |         18        0.18       99.13
         44 |         14        0.14       99.27
         45 |         11        0.11       99.38
         46 |          7        0.07       99.45
         47 |          7        0.07       99.52
         48 |          7        0.07       99.59
         49 |          7        0.07       99.66
         50 |          5        0.05       99.71
         51 |          5        0.05       99.76
         52 |          5        0.05       99.81
         53 |          3        0.03       99.84
         54 |          2        0.02       99.86
         55 |          2        0.02       99.88
         56 |          2        0.02       99.90
         57 |          2        0.02       99.92
         58 |          2        0.02       99.94
         59 |          1        0.01       99.95
         60 |          1        0.01       99.96
         61 |          1        0.01       99.97
         62 |          1        0.01       99.98
         63 |          1        0.01       99.99
         64 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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