Frequencies for minute variable in person dataset :

     minute |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        306       23.87       23.87
          4 |          2        0.16       24.02
          5 |         21        1.64       25.66
          6 |          3        0.23       25.90
         10 |         44        3.43       29.33
         13 |          3        0.23       29.56
         15 |        140       10.92       40.48
         18 |          2        0.16       40.64
         19 |          2        0.16       40.80
         20 |         85        6.63       47.43
         22 |          3        0.23       47.66
         25 |         36        2.81       50.47
         26 |          1        0.08       50.55
         30 |        275       21.45       72.00
         35 |         30        2.34       74.34
         40 |         67        5.23       79.56
         41 |          2        0.16       79.72
         42 |          3        0.23       79.95
         45 |        114        8.89       88.85
         48 |          2        0.16       89.00
         50 |        108        8.42       97.43
         53 |          2        0.16       97.58
         54 |          4        0.31       97.89
         55 |         18        1.40       99.30
         58 |          3        0.23       99.53
         59 |          5        0.39       99.92
         99 |          1        0.08      100.00
------------+-----------------------------------
      Total |      1,282      100.00

by Jean Roth , jroth@nber.org , 18 Apr 2016