Frequencies for first 10,000 rows of crdvsclr_srgry_sw variable in pos2006 dataset :

      spec: |
cardiovascu |
        lar |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,531       95.31       95.31
          N |        445        4.45       99.76
          Y |         24        0.24      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 17 May 2017