Frequencies for first 10,000 rows of vday variable in namcs1993 dataset :

     day of |
    visit - |
       1-31 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        398        3.98        3.98
          2 |        347        3.47        7.45
          3 |        384        3.84       11.29
          4 |        333        3.33       14.62
          5 |        417        4.17       18.79
          6 |        339        3.39       22.18
          7 |        319        3.19       25.37
          8 |        347        3.47       28.84
          9 |        413        4.13       32.97
         10 |        227        2.27       35.24
         11 |        318        3.18       38.42
         12 |        294        2.94       41.36
         13 |        198        1.98       43.34
         14 |        274        2.74       46.08
         15 |        320        3.20       49.28
         16 |        360        3.60       52.88
         17 |        376        3.76       56.64
         18 |        318        3.18       59.82
         19 |        359        3.59       63.41
         20 |        352        3.52       66.93
         21 |        277        2.77       69.70
         22 |        433        4.33       74.03
         23 |        411        4.11       78.14
         24 |        284        2.84       80.98
         25 |        281        2.81       83.79
         26 |        334        3.34       87.13
         27 |        302        3.02       90.15
         28 |        266        2.66       92.81
         29 |        326        3.26       96.07
         30 |        293        2.93       99.00
         31 |        100        1.00      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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