Frequencies for first 10,000 rows of crdvsclr_srgry_sw variable in pos2010 dataset :

      SPEC: |
CARDIOVASCU |
        LAR |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,632       96.32       96.32
          N |        356        3.56       99.88
          Y |         12        0.12      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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