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

        day |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        428        4.28        4.28
          2 |        361        3.61        7.89
          3 |        394        3.94       11.83
          4 |        305        3.05       14.88
          5 |        360        3.60       18.48
          6 |        330        3.30       21.78
          7 |        374        3.74       25.52
          8 |        327        3.27       28.79
          9 |        285        2.85       31.64
         10 |        219        2.19       33.83
         11 |        296        2.96       36.79
         12 |        337        3.37       40.16
         13 |        261        2.61       42.77
         14 |        288        2.88       45.65
         15 |        336        3.36       49.01
         16 |        316        3.16       52.17
         17 |        310        3.10       55.27
         18 |        231        2.31       57.58
         19 |        335        3.35       60.93
         20 |        304        3.04       63.97
         21 |        314        3.14       67.11
         22 |        421        4.21       71.32
         23 |        382        3.82       75.14
         24 |        303        3.03       78.17
         25 |        261        2.61       80.78
         26 |        386        3.86       84.64
         27 |        389        3.89       88.53
         28 |        350        3.50       92.03
         29 |        271        2.71       94.74
         30 |        311        3.11       97.85
         31 |        206        2.06       99.91
         99 |          9        0.09      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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