Frequencies for first 10,000 rows of crdvsclr_srgry_sw variable in pos1995 dataset :

      spec: |
cardiovascu |
        lar |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,552       95.52       95.52
          N |        409        4.09       99.61
          Y |         39        0.39      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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