Frequencies for first 10,000 rows of prov2240 variable in pos2006 dataset :

      spec: |
neurologica |
          l |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,531       95.31       95.31
          N |        404        4.04       99.35
          Y |         65        0.65      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 26 Jan 2016