Frequencies for first 10,000 rows of timemd variable in namcs1996 dataset :

       time spent with |
physician (in minutes) |      Freq.     Percent        Cum.
-----------------------+-----------------------------------
             0 minutes |      1,295       12.95       12.95
              1 minute |          1        0.01       12.96
             2 minutes |          3        0.03       12.99
             3 minutes |         10        0.10       13.09
             4 minutes |         11        0.11       13.20
             5 minutes |        272        2.72       15.92
             6 minutes |         41        0.41       16.33
             7 minutes |         60        0.60       16.93
             8 minutes |         73        0.73       17.66
             9 minutes |         12        0.12       17.78
            10 minutes |      1,459       14.59       32.37
            11 minutes |         19        0.19       32.56
            12 minutes |        127        1.27       33.83
            13 minutes |         52        0.52       34.35
            14 minutes |         18        0.18       34.53
            15 minutes |      2,637       26.37       60.90
            16 minutes |         15        0.15       61.05
            17 minutes |          9        0.09       61.14
            18 minutes |         58        0.58       61.72
            19 minutes |          8        0.08       61.80
            20 minutes |      1,510       15.10       76.90
            21 minutes |          6        0.06       76.96
            22 minutes |         15        0.15       77.11
            23 minutes |         20        0.20       77.31
            24 minutes |          4        0.04       77.35
            25 minutes |        385        3.85       81.20
            26 minutes |          3        0.03       81.23
            27 minutes |          2        0.02       81.25
            28 minutes |          6        0.06       81.31
            30 minutes |      1,010       10.10       91.41
            31 minutes |          3        0.03       91.44
            32 minutes |          1        0.01       91.45
            33 minutes |          2        0.02       91.47
            35 minutes |         74        0.74       92.21
            36 minutes |          1        0.01       92.22
            38 minutes |          9        0.09       92.31
            39 minutes |          3        0.03       92.34
            40 minutes |        110        1.10       93.44
            43 minutes |          4        0.04       93.48
            45 minutes |        275        2.75       96.23
            48 minutes |          1        0.01       96.24
            50 minutes |         94        0.94       97.18
            53 minutes |          3        0.03       97.21
            55 minutes |          8        0.08       97.29
                1 hour |        186        1.86       99.15
  1 hour and 2 minutes |          1        0.01       99.16
  1 hour and 5 minutes |          4        0.04       99.20
 1 hour and 10 minutes |          1        0.01       99.21
 1 hour and 15 minutes |         11        0.11       99.32
 1 hour and 20 minutes |          3        0.03       99.35
 1 hour and 25 minutes |          1        0.01       99.36
 1 hour and 30 minutes |         34        0.34       99.70
 1 hour and 45 minutes |          1        0.01       99.71
 1 hour and 49 minutes |          1        0.01       99.72
               2 hours |         15        0.15       99.87
 2 hours and 5 minutes |          1        0.01       99.88
2 hours and 15 minutes |          1        0.01       99.89
2 hours and 25 minutes |          1        0.01       99.90
2 hours and 30 minutes |          2        0.02       99.92
               3 hours |          4        0.04       99.96
3 hours and 25 minutes |          1        0.01       99.97
3 hours and 30 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