Frequencies for first 10,000 rows of timemd variable in namcs2002 dataset :

       Time spent with |
             physician |      Freq.     Percent        Cum.
-----------------------+-----------------------------------
             0 minutes |        472        4.72        4.72
              1 minute |          1        0.01        4.73
             2 minutes |          3        0.03        4.76
             3 minutes |         13        0.13        4.89
             4 minutes |          8        0.08        4.97
             5 minutes |        287        2.87        7.84
             6 minutes |         47        0.47        8.31
             7 minutes |         83        0.83        9.14
             8 minutes |        100        1.00       10.14
             9 minutes |         22        0.22       10.36
            10 minutes |      1,692       16.92       27.28
            11 minutes |         27        0.27       27.55
            12 minutes |        133        1.33       28.88
            13 minutes |         45        0.45       29.33
            14 minutes |         24        0.24       29.57
            15 minutes |      2,973       29.73       59.30
            16 minutes |         16        0.16       59.46
            17 minutes |         26        0.26       59.72
            18 minutes |         68        0.68       60.40
            19 minutes |          8        0.08       60.48
            20 minutes |      1,528       15.28       75.76
            21 minutes |         13        0.13       75.89
            22 minutes |         28        0.28       76.17
            23 minutes |         15        0.15       76.32
            24 minutes |          9        0.09       76.41
            25 minutes |        371        3.71       80.12
            26 minutes |          2        0.02       80.14
            27 minutes |          5        0.05       80.19
            28 minutes |         10        0.10       80.29
            29 minutes |          1        0.01       80.30
            30 minutes |      1,062       10.62       90.92
            31 minutes |          2        0.02       90.94
            32 minutes |          6        0.06       91.00
            33 minutes |          2        0.02       91.02
            35 minutes |        168        1.68       92.70
            36 minutes |          2        0.02       92.72
            37 minutes |          5        0.05       92.77
            38 minutes |          1        0.01       92.78
            39 minutes |          1        0.01       92.79
            40 minutes |        137        1.37       94.16
            41 minutes |          3        0.03       94.19
            42 minutes |          6        0.06       94.25
            43 minutes |          2        0.02       94.27
            44 minutes |          2        0.02       94.29
            45 minutes |        247        2.47       96.76
            46 minutes |          6        0.06       96.82
            47 minutes |          3        0.03       96.85
            48 minutes |          2        0.02       96.87
            50 minutes |        104        1.04       97.91
            51 minutes |          1        0.01       97.92
            52 minutes |          1        0.01       97.93
            55 minutes |         32        0.32       98.25
            57 minutes |          2        0.02       98.27
            58 minutes |          1        0.01       98.28
                1 hour |        131        1.31       99.59
  1 hour and 2 minutes |          3        0.03       99.62
  1 hour and 5 minutes |          2        0.02       99.64
  1 hour and 6 minutes |          1        0.01       99.65
 1 hour and 15 minutes |          5        0.05       99.70
 1 hour and 20 minutes |          4        0.04       99.74
 1 hour and 30 minutes |         15        0.15       99.89
 1 hour and 45 minutes |          1        0.01       99.90
               2 hours |          6        0.06       99.96
2 hours and 20 minutes |          1        0.01       99.97
               3 hours |          2        0.02       99.99
               4 hours |          1        0.01      100.00
-----------------------+-----------------------------------
                 Total |     10,000      100.00

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