Frequencies for first 10,000 rows of timemd variable in namcs2007 dataset :

       time spent with |
             physician |      Freq.     Percent        Cum.
-----------------------+-----------------------------------
             0 minutes |        434        4.34        4.34
              1 minute |          2        0.02        4.36
             2 minutes |          1        0.01        4.37
             3 minutes |         11        0.11        4.48
             4 minutes |         10        0.10        4.58
             5 minutes |        127        1.27        5.85
             6 minutes |         36        0.36        6.21
             7 minutes |         64        0.64        6.85
             8 minutes |         63        0.63        7.48
             9 minutes |         30        0.30        7.78
            10 minutes |      1,304       13.04       20.82
            11 minutes |          8        0.08       20.90
            12 minutes |         94        0.94       21.84
            13 minutes |         24        0.24       22.08
            14 minutes |         11        0.11       22.19
            15 minutes |      3,814       38.14       60.33
            16 minutes |         10        0.10       60.43
            17 minutes |         16        0.16       60.59
            18 minutes |         46        0.46       61.05
            19 minutes |          6        0.06       61.11
            20 minutes |      1,777       17.77       78.88
            21 minutes |          8        0.08       78.96
            22 minutes |         11        0.11       79.07
            23 minutes |          7        0.07       79.14
            24 minutes |          4        0.04       79.18
            25 minutes |        443        4.43       83.61
            26 minutes |          5        0.05       83.66
            27 minutes |          3        0.03       83.69
            28 minutes |          3        0.03       83.72
            30 minutes |      1,094       10.94       94.66
            32 minutes |          1        0.01       94.67
            34 minutes |          2        0.02       94.69
            35 minutes |         57        0.57       95.26
            40 minutes |        115        1.15       96.41
            45 minutes |        139        1.39       97.80
            48 minutes |          1        0.01       97.81
            50 minutes |         66        0.66       98.47
            52 minutes |          1        0.01       98.48
            53 minutes |          3        0.03       98.51
            55 minutes |          5        0.05       98.56
                1 hour |         86        0.86       99.42
  1 hour and 5 minutes |          2        0.02       99.44
  1 hour and 7 minutes |          3        0.03       99.47
 1 hour and 10 minutes |          1        0.01       99.48
 1 hour and 11 minutes |          1        0.01       99.49
 1 hour and 15 minutes |          5        0.05       99.54
 1 hour and 20 minutes |          1        0.01       99.55
 1 hour and 23 minutes |          1        0.01       99.56
 1 hour and 24 minutes |          1        0.01       99.57
 1 hour and 30 minutes |         15        0.15       99.72
 1 hour and 33 minutes |          1        0.01       99.73
 1 hour and 35 minutes |          1        0.01       99.74
 1 hour and 40 minutes |          2        0.02       99.76
 1 hour and 50 minutes |          5        0.05       99.81
               2 hours |          6        0.06       99.87
2 hours and 15 minutes |          1        0.01       99.88
2 hours and 30 minutes |          1        0.01       99.89
2 hours and 36 minutes |          1        0.01       99.90
               3 hours |          4        0.04       99.94
3 hours and 10 minutes |          1        0.01       99.95
3 hours and 21 minutes |          1        0.01       99.96
               4 hours |          4        0.04      100.00
-----------------------+-----------------------------------
                 Total |     10,000      100.00

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