Frequencies for first 10,000 rows of vday variable in nhamcsopd1994 dataset :

     day of |
    visit - |
       1-31 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        350        3.50        3.50
          2 |        376        3.76        7.26
          3 |        328        3.28       10.54
          4 |        308        3.08       13.62
          5 |        275        2.75       16.37
          6 |        292        2.92       19.29
          7 |        396        3.96       23.25
          8 |        309        3.09       26.34
          9 |        274        2.74       29.08
         10 |        341        3.41       32.49
         11 |        353        3.53       36.02
         12 |        354        3.54       39.56
         13 |        316        3.16       42.72
         14 |        398        3.98       46.70
         15 |        348        3.48       50.18
         16 |        291        2.91       53.09
         17 |        306        3.06       56.15
         18 |        353        3.53       59.68
         19 |        354        3.54       63.22
         20 |        322        3.22       66.44
         21 |        342        3.42       69.86
         22 |        346        3.46       73.32
         23 |        274        2.74       76.06
         24 |        328        3.28       79.34
         25 |        339        3.39       82.73
         26 |        320        3.20       85.93
         27 |        260        2.60       88.53
         28 |        399        3.99       92.52
         29 |        306        3.06       95.58
         30 |        214        2.14       97.72
         31 |        228        2.28      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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