Frequencies for first 10,000 rows of vday variable in nhamcsed1993 dataset :

     day of |
      visit |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        373        3.73        3.73
          2 |        323        3.23        6.96
          3 |        313        3.13       10.09
          4 |        340        3.40       13.49
          5 |        315        3.15       16.64
          6 |        339        3.39       20.03
          7 |        323        3.23       23.26
          8 |        333        3.33       26.59
          9 |        327        3.27       29.86
         10 |        325        3.25       33.11
         11 |        314        3.14       36.25
         12 |        325        3.25       39.50
         13 |        344        3.44       42.94
         14 |        347        3.47       46.41
         15 |        317        3.17       49.58
         16 |        329        3.29       52.87
         17 |        342        3.42       56.29
         18 |        345        3.45       59.74
         19 |        340        3.40       63.14
         20 |        334        3.34       66.48
         21 |        329        3.29       69.77
         22 |        318        3.18       72.95
         23 |        315        3.15       76.10
         24 |        328        3.28       79.38
         25 |        341        3.41       82.79
         26 |        333        3.33       86.12
         27 |        293        2.93       89.05
         28 |        327        3.27       92.32
         29 |        298        2.98       95.30
         30 |        288        2.88       98.18
         31 |        182        1.82      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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