Frequencies for first 10,000 rows of cebvd variable in nhamcsopd2007 dataset :

       does |
patient now |
      have: |
cerebrovasc |
       ular |
    disease |      Freq.     Percent        Cum.
------------+-----------------------------------
         no |      9,780       97.80       97.80
        yes |        220        2.20      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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