Frequencies for first 10,000 rows of timemd variable in namcs2008 dataset :

       time spent with |
             physician |      Freq.     Percent        Cum.
-----------------------+-----------------------------------
             0 minutes |        260        2.60        2.60
              1 minute |          3        0.03        2.63
             2 minutes |          4        0.04        2.67
             3 minutes |          3        0.03        2.70
             5 minutes |        133        1.33        4.03
             6 minutes |         10        0.10        4.13
             7 minutes |         39        0.39        4.52
             8 minutes |         17        0.17        4.69
             9 minutes |          4        0.04        4.73
            10 minutes |      1,177       11.77       16.50
            11 minutes |          8        0.08       16.58
            12 minutes |        103        1.03       17.61
            13 minutes |         19        0.19       17.80
            14 minutes |         22        0.22       18.02
            15 minutes |      3,950       39.50       57.52
            16 minutes |         29        0.29       57.81
            17 minutes |         58        0.58       58.39
            18 minutes |         97        0.97       59.36
            19 minutes |          3        0.03       59.39
            20 minutes |      1,528       15.28       74.67
            21 minutes |         14        0.14       74.81
            22 minutes |         20        0.20       75.01
            23 minutes |         14        0.14       75.15
            24 minutes |         11        0.11       75.26
            25 minutes |        476        4.76       80.02
            26 minutes |          9        0.09       80.11
            27 minutes |          4        0.04       80.15
            28 minutes |         20        0.20       80.35
            29 minutes |          6        0.06       80.41
            30 minutes |      1,190       11.90       92.31
            31 minutes |          2        0.02       92.33
            32 minutes |         17        0.17       92.50
            33 minutes |          3        0.03       92.53
            34 minutes |          4        0.04       92.57
            35 minutes |         93        0.93       93.50
            36 minutes |          5        0.05       93.55
            37 minutes |          3        0.03       93.58
            38 minutes |          2        0.02       93.60
            39 minutes |          2        0.02       93.62
            40 minutes |        177        1.77       95.39
            42 minutes |          4        0.04       95.43
            43 minutes |          7        0.07       95.50
            44 minutes |          4        0.04       95.54
            45 minutes |        175        1.75       97.29
            46 minutes |          3        0.03       97.32
            47 minutes |          1        0.01       97.33
            48 minutes |          5        0.05       97.38
            50 minutes |         20        0.20       97.58
            51 minutes |          2        0.02       97.60
            53 minutes |          4        0.04       97.64
            54 minutes |          5        0.05       97.69
            55 minutes |         10        0.10       97.79
            56 minutes |          1        0.01       97.80
            58 minutes |          1        0.01       97.81
            59 minutes |          1        0.01       97.82
                1 hour |        140        1.40       99.22
  1 hour and 2 minutes |          2        0.02       99.24
  1 hour and 3 minutes |          1        0.01       99.25
  1 hour and 4 minutes |          1        0.01       99.26
  1 hour and 5 minutes |          8        0.08       99.34
  1 hour and 6 minutes |          2        0.02       99.36
 1 hour and 10 minutes |         13        0.13       99.49
 1 hour and 13 minutes |          1        0.01       99.50
 1 hour and 15 minutes |         16        0.16       99.66
 1 hour and 22 minutes |          1        0.01       99.67
 1 hour and 30 minutes |          9        0.09       99.76
 1 hour and 52 minutes |          2        0.02       99.78
               2 hours |          2        0.02       99.80
2 hours and 10 minutes |          1        0.01       99.81
2 hours and 14 minutes |          1        0.01       99.82
2 hours and 15 minutes |          1        0.01       99.83
2 hours and 22 minutes |          1        0.01       99.84
2 hours and 30 minutes |          7        0.07       99.91
2 hours and 31 minutes |          2        0.02       99.93
2 hours and 45 minutes |          5        0.05       99.98
2 hours and 50 minutes |          1        0.01       99.99
3 hours and 21 minutes |          1        0.01      100.00
-----------------------+-----------------------------------
                 Total |     10,000      100.00

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