Frequencies for first 10,000 rows of vday variable in nhamcsed1995 dataset :

     day of |
      visit |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        310        3.10        3.10
          2 |        336        3.36        6.46
          3 |        328        3.28        9.74
          4 |        351        3.51       13.25
          5 |        346        3.46       16.71
          6 |        334        3.34       20.05
          7 |        326        3.26       23.31
          8 |        330        3.30       26.61
          9 |        324        3.24       29.85
         10 |        322        3.22       33.07
         11 |        319        3.19       36.26
         12 |        332        3.32       39.58
         13 |        337        3.37       42.95
         14 |        307        3.07       46.02
         15 |        315        3.15       49.17
         16 |        339        3.39       52.56
         17 |        336        3.36       55.92
         18 |        371        3.71       59.63
         19 |        339        3.39       63.02
         20 |        314        3.14       66.16
         21 |        327        3.27       69.43
         22 |        327        3.27       72.70
         23 |        319        3.19       75.89
         24 |        307        3.07       78.96
         25 |        311        3.11       82.07
         26 |        341        3.41       85.48
         27 |        324        3.24       88.72
         28 |        322        3.22       91.94
         29 |        287        2.87       94.81
         30 |        331        3.31       98.12
         31 |        188        1.88      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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