Frequencies for first 10,000 rows of timemd variable in namcs1999 dataset :

       time spent with |
physician (in minutes) |      Freq.     Percent        Cum.
-----------------------+-----------------------------------
             0 minutes |        324        3.24        3.24
              1 minute |          3        0.03        3.27
             2 minutes |          7        0.07        3.34
             3 minutes |         21        0.21        3.55
             4 minutes |         20        0.20        3.75
             5 minutes |        263        2.63        6.38
             6 minutes |         46        0.46        6.84
             7 minutes |         43        0.43        7.27
             8 minutes |        154        1.54        8.81
             9 minutes |         16        0.16        8.97
            10 minutes |      1,388       13.88       22.85
            11 minutes |          9        0.09       22.94
            12 minutes |        101        1.01       23.95
            13 minutes |         33        0.33       24.28
            14 minutes |          9        0.09       24.37
            15 minutes |      2,602       26.02       50.39
            16 minutes |          7        0.07       50.46
            17 minutes |         13        0.13       50.59
            18 minutes |         24        0.24       50.83
            19 minutes |          4        0.04       50.87
            20 minutes |      1,632       16.32       67.19
            21 minutes |         14        0.14       67.33
            22 minutes |         29        0.29       67.62
            23 minutes |         13        0.13       67.75
            24 minutes |          6        0.06       67.81
            25 minutes |        386        3.86       71.67
            26 minutes |          4        0.04       71.71
            27 minutes |          5        0.05       71.76
            28 minutes |          4        0.04       71.80
            29 minutes |          2        0.02       71.82
            30 minutes |      1,293       12.93       84.75
            31 minutes |          1        0.01       84.76
            32 minutes |          3        0.03       84.79
            33 minutes |          2        0.02       84.81
            35 minutes |        124        1.24       86.05
            38 minutes |          3        0.03       86.08
            40 minutes |        150        1.50       87.58
            41 minutes |          1        0.01       87.59
            42 minutes |          1        0.01       87.60
            45 minutes |        529        5.29       92.89
            47 minutes |          1        0.01       92.90
            48 minutes |          3        0.03       92.93
            50 minutes |        212        2.12       95.05
            53 minutes |          3        0.03       95.08
            54 minutes |          2        0.02       95.10
            55 minutes |         69        0.69       95.79
            57 minutes |          5        0.05       95.84
                1 hour |        300        3.00       98.84
  1 hour and 2 minutes |          1        0.01       98.85
  1 hour and 5 minutes |         14        0.14       98.99
  1 hour and 7 minutes |          2        0.02       99.01
 1 hour and 10 minutes |          9        0.09       99.10
 1 hour and 15 minutes |         13        0.13       99.23
 1 hour and 20 minutes |          5        0.05       99.28
 1 hour and 25 minutes |          1        0.01       99.29
 1 hour and 30 minutes |         35        0.35       99.64
 1 hour and 50 minutes |          2        0.02       99.66
               2 hours |         26        0.26       99.92
 2 hours and 5 minutes |          1        0.01       99.93
2 hours and 10 minutes |          1        0.01       99.94
2 hours and 15 minutes |          1        0.01       99.95
2 hours and 20 minutes |          1        0.01       99.96
               3 hours |          4        0.04      100.00
-----------------------+-----------------------------------
                 Total |     10,000      100.00

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