Frequencies for first 10,000 rows of timemd variable in namcs1997 dataset :

       time spent with |
physician (in minutes) |      Freq.     Percent        Cum.
-----------------------+-----------------------------------
             0 minutes |        280        2.80        2.80
              1 minute |          4        0.04        2.84
             2 minutes |          5        0.05        2.89
             3 minutes |         17        0.17        3.06
             4 minutes |         19        0.19        3.25
             5 minutes |        331        3.31        6.56
             6 minutes |         97        0.97        7.53
             7 minutes |         94        0.94        8.47
             8 minutes |        168        1.68       10.15
             9 minutes |         37        0.37       10.52
            10 minutes |      1,625       16.25       26.77
            11 minutes |         27        0.27       27.04
            12 minutes |        123        1.23       28.27
            13 minutes |         79        0.79       29.06
            14 minutes |         38        0.38       29.44
            15 minutes |      2,898       28.98       58.42
            16 minutes |         26        0.26       58.68
            17 minutes |         43        0.43       59.11
            18 minutes |         45        0.45       59.56
            19 minutes |          3        0.03       59.59
            20 minutes |      1,686       16.86       76.45
            21 minutes |          6        0.06       76.51
            22 minutes |         19        0.19       76.70
            23 minutes |         17        0.17       76.87
            24 minutes |          7        0.07       76.94
            25 minutes |        376        3.76       80.70
            26 minutes |          7        0.07       80.77
            27 minutes |          5        0.05       80.82
            28 minutes |          9        0.09       80.91
            29 minutes |          2        0.02       80.93
            30 minutes |      1,060       10.60       91.53
            31 minutes |          1        0.01       91.54
            32 minutes |          9        0.09       91.63
            33 minutes |          1        0.01       91.64
            34 minutes |          5        0.05       91.69
            35 minutes |         67        0.67       92.36
            36 minutes |          2        0.02       92.38
            37 minutes |          1        0.01       92.39
            38 minutes |          1        0.01       92.40
            39 minutes |          4        0.04       92.44
            40 minutes |        106        1.06       93.50
            42 minutes |          1        0.01       93.51
            45 minutes |        296        2.96       96.47
            46 minutes |          1        0.01       96.48
            47 minutes |          2        0.02       96.50
            48 minutes |         12        0.12       96.62
            49 minutes |          1        0.01       96.63
            50 minutes |         70        0.70       97.33
            51 minutes |          1        0.01       97.34
            52 minutes |          1        0.01       97.35
            53 minutes |          1        0.01       97.36
            55 minutes |         16        0.16       97.52
            56 minutes |          2        0.02       97.54
            57 minutes |          3        0.03       97.57
                1 hour |        182        1.82       99.39
  1 hour and 2 minutes |          1        0.01       99.40
  1 hour and 5 minutes |          7        0.07       99.47
 1 hour and 10 minutes |          1        0.01       99.48
 1 hour and 13 minutes |          1        0.01       99.49
 1 hour and 15 minutes |          4        0.04       99.53
 1 hour and 20 minutes |          3        0.03       99.56
 1 hour and 30 minutes |         21        0.21       99.77
 1 hour and 45 minutes |          1        0.01       99.78
               2 hours |          9        0.09       99.87
2 hours and 30 minutes |          2        0.02       99.89
               3 hours |          7        0.07       99.96
3 hours and 18 minutes |          1        0.01       99.97
               4 hours |          3        0.03      100.00
-----------------------+-----------------------------------
                 Total |     10,000      100.00

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