Frequencies for first 10,000 rows of vday variable in nhamcsed1994 dataset :

     day of |
      visit |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        335        3.35        3.35
          2 |        348        3.48        6.83
          3 |        329        3.29       10.12
          4 |        342        3.42       13.54
          5 |        327        3.27       16.81
          6 |        339        3.39       20.20
          7 |        338        3.38       23.58
          8 |        329        3.29       26.87
          9 |        318        3.18       30.05
         10 |        333        3.33       33.38
         11 |        326        3.26       36.64
         12 |        330        3.30       39.94
         13 |        328        3.28       43.22
         14 |        322        3.22       46.44
         15 |        327        3.27       49.71
         16 |        326        3.26       52.97
         17 |        308        3.08       56.05
         18 |        323        3.23       59.28
         19 |        335        3.35       62.63
         20 |        327        3.27       65.90
         21 |        343        3.43       69.33
         22 |        322        3.22       72.55
         23 |        333        3.33       75.88
         24 |        324        3.24       79.12
         25 |        336        3.36       82.48
         26 |        308        3.08       85.56
         27 |        302        3.02       88.58
         28 |        327        3.27       91.85
         29 |        312        3.12       94.97
         30 |        311        3.11       98.08
         31 |        192        1.92      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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