Frequencies for first 10,000 rows of cebvd variable in nhamcsed2012 dataset :

       Does |
    patient |
      have: |
Cerebrovasc |
       ular |
disease/his |
    tory of |
  stroke or |
  transient |
     ischem |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      9,794       97.94       97.94
        Yes |        206        2.06      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 7 Nov 2016