Frequencies for first 10,000 rows of vmonth variable in namcs2014 dataset :

   Month of |
      visit |      Freq.     Percent        Cum.
------------+-----------------------------------
    January |      1,104       11.04       11.04
   February |        831        8.31       19.35
      March |      1,036       10.36       29.71
      April |        826        8.26       37.97
        May |        717        7.17       45.14
       June |        745        7.45       52.59
       July |        737        7.37       59.96
     August |        563        5.63       65.59
  September |        830        8.30       73.89
    October |      1,040       10.40       84.29
   November |        721        7.21       91.50
   December |        850        8.50      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 27 Mar 2017