Frequencies for first 10,000 rows of vday variable in nhamcsopd1996 dataset :

     day of |
    visit - |
       1-31 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        338        3.38        3.38
          2 |        273        2.73        6.11
          3 |        319        3.19        9.30
          4 |        362        3.62       12.92
          5 |        366        3.66       16.58
          6 |        236        2.36       18.94
          7 |        294        2.94       21.88
          8 |        304        3.04       24.92
          9 |        367        3.67       28.59
         10 |        382        3.82       32.41
         11 |        368        3.68       36.09
         12 |        374        3.74       39.83
         13 |        288        2.88       42.71
         14 |        283        2.83       45.54
         15 |        309        3.09       48.63
         16 |        361        3.61       52.24
         17 |        385        3.85       56.09
         18 |        419        4.19       60.28
         19 |        399        3.99       64.27
         20 |        249        2.49       66.76
         21 |        291        2.91       69.67
         22 |        323        3.23       72.90
         23 |        318        3.18       76.08
         24 |        326        3.26       79.34
         25 |        355        3.55       82.89
         26 |        410        4.10       86.99
         27 |        275        2.75       89.74
         28 |        288        2.88       92.62
         29 |        354        3.54       96.16
         30 |        225        2.25       98.41
         31 |        159        1.59      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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