Frequencies for first 10,000 rows of timemd variable in namcs2005 dataset :

       time spent with |
             physician |      Freq.     Percent        Cum.
-----------------------+-----------------------------------
             0 minutes |        281        2.81        2.81
              1 minute |          8        0.08        2.89
             2 minutes |          7        0.07        2.96
             3 minutes |          4        0.04        3.00
             4 minutes |         15        0.15        3.15
             5 minutes |        127        1.27        4.42
             6 minutes |         25        0.25        4.67
             7 minutes |         84        0.84        5.51
             8 minutes |        111        1.11        6.62
             9 minutes |         18        0.18        6.80
            10 minutes |      1,458       14.58       21.38
            11 minutes |         33        0.33       21.71
            12 minutes |        107        1.07       22.78
            13 minutes |         19        0.19       22.97
            14 minutes |          6        0.06       23.03
            15 minutes |      3,274       32.74       55.77
            16 minutes |         20        0.20       55.97
            17 minutes |         17        0.17       56.14
            18 minutes |         54        0.54       56.68
            19 minutes |         12        0.12       56.80
            20 minutes |      1,903       19.03       75.83
            21 minutes |          5        0.05       75.88
            22 minutes |          9        0.09       75.97
            23 minutes |         28        0.28       76.25
            24 minutes |          5        0.05       76.30
            25 minutes |        505        5.05       81.35
            26 minutes |         16        0.16       81.51
            27 minutes |          7        0.07       81.58
            28 minutes |         10        0.10       81.68
            29 minutes |          6        0.06       81.74
            30 minutes |      1,156       11.56       93.30
            31 minutes |          2        0.02       93.32
            32 minutes |          9        0.09       93.41
            33 minutes |          4        0.04       93.45
            34 minutes |          3        0.03       93.48
            35 minutes |        119        1.19       94.67
            36 minutes |          7        0.07       94.74
            37 minutes |          2        0.02       94.76
            38 minutes |          6        0.06       94.82
            39 minutes |          2        0.02       94.84
            40 minutes |        151        1.51       96.35
            42 minutes |          5        0.05       96.40
            44 minutes |          1        0.01       96.41
            45 minutes |        202        2.02       98.43
            46 minutes |          1        0.01       98.44
            47 minutes |          4        0.04       98.48
            50 minutes |         17        0.17       98.65
            52 minutes |          1        0.01       98.66
            55 minutes |          4        0.04       98.70
            57 minutes |          1        0.01       98.71
            59 minutes |          1        0.01       98.72
                1 hour |         86        0.86       99.58
  1 hour and 5 minutes |          3        0.03       99.61
  1 hour and 8 minutes |          1        0.01       99.62
 1 hour and 10 minutes |          5        0.05       99.67
 1 hour and 12 minutes |          3        0.03       99.70
 1 hour and 15 minutes |          3        0.03       99.73
 1 hour and 17 minutes |          1        0.01       99.74
 1 hour and 19 minutes |          1        0.01       99.75
 1 hour and 20 minutes |          1        0.01       99.76
 1 hour and 22 minutes |          2        0.02       99.78
 1 hour and 30 minutes |          8        0.08       99.86
 1 hour and 32 minutes |          2        0.02       99.88
 1 hour and 33 minutes |          1        0.01       99.89
               2 hours |          6        0.06       99.95
2 hours and 38 minutes |          1        0.01       99.96
               3 hours |          1        0.01       99.97
3 hours and 10 minutes |          1        0.01       99.98
               4 hours |          2        0.02      100.00
-----------------------+-----------------------------------
                 Total |     10,000      100.00

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