Frequencies for first 10,000 rows of day variable in person dataset :

        day |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        441        4.41        4.41
          2 |        366        3.66        8.07
          3 |        335        3.35       11.42
          4 |        379        3.79       15.21
          5 |        298        2.98       18.19
          6 |        354        3.54       21.73
          7 |        315        3.15       24.88
          8 |        306        3.06       27.94
          9 |        351        3.51       31.45
         10 |        314        3.14       34.59
         11 |        317        3.17       37.76
         12 |        352        3.52       41.28
         13 |        272        2.72       44.00
         14 |        279        2.79       46.79
         15 |        401        4.01       50.80
         16 |        378        3.78       54.58
         17 |        344        3.44       58.02
         18 |        398        3.98       62.00
         19 |        296        2.96       64.96
         20 |        301        3.01       67.97
         21 |        304        3.04       71.01
         22 |        350        3.50       74.51
         23 |        335        3.35       77.86
         24 |        328        3.28       81.14
         25 |        341        3.41       84.55
         26 |        268        2.68       87.23
         27 |        281        2.81       90.04
         28 |        318        3.18       93.22
         29 |        273        2.73       95.95
         30 |        255        2.55       98.50
         31 |        150        1.50      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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