Frequencies for first 10,000 rows of patcode variable in namcs2013 dataset :

 Sequential |
  numbering |
   of visit |
records per |
  physician |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        520        5.20        5.20
          2 |        493        4.93       10.13
          3 |        475        4.75       14.88
          4 |        465        4.65       19.53
          5 |        452        4.52       24.05
          6 |        437        4.37       28.42
          7 |        426        4.26       32.68
          8 |        414        4.14       36.82
          9 |        403        4.03       40.85
         10 |        386        3.86       44.71
         11 |        368        3.68       48.39
         12 |        354        3.54       51.93
         13 |        345        3.45       55.38
         14 |        334        3.34       58.72
         15 |        327        3.27       61.99
         16 |        314        3.14       65.13
         17 |        297        2.97       68.10
         18 |        287        2.87       70.97
         19 |        280        2.80       73.77
         20 |        267        2.67       76.44
         21 |        244        2.44       78.88
         22 |        233        2.33       81.21
         23 |        215        2.15       83.36
         24 |        192        1.92       85.28
         25 |        178        1.78       87.06
         26 |        161        1.61       88.67
         27 |        146        1.46       90.13
         28 |        135        1.35       91.48
         29 |        125        1.25       92.73
         30 |        117        1.17       93.90
         31 |        101        1.01       94.91
         32 |         88        0.88       95.79
         33 |         78        0.78       96.57
         34 |         68        0.68       97.25
         35 |         60        0.60       97.85
         36 |         49        0.49       98.34
         37 |         40        0.40       98.74
         38 |         29        0.29       99.03
         39 |         23        0.23       99.26
         40 |         17        0.17       99.43
         41 |         11        0.11       99.54
         42 |          6        0.06       99.60
         43 |          5        0.05       99.65
         44 |          4        0.04       99.69
         45 |          4        0.04       99.73
         46 |          3        0.03       99.76
         47 |          2        0.02       99.78
         48 |          2        0.02       99.80
         49 |          2        0.02       99.82
         50 |          2        0.02       99.84
         51 |          2        0.02       99.86
         52 |          2        0.02       99.88
         53 |          2        0.02       99.90
         54 |          1        0.01       99.91
         55 |          1        0.01       99.92
         56 |          1        0.01       99.93
         57 |          1        0.01       99.94
         58 |          1        0.01       99.95
         59 |          1        0.01       99.96
         60 |          1        0.01       99.97
         61 |          1        0.01       99.98
         62 |          1        0.01       99.99
         63 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 27 Mar 2017