Frequencies for first 10,000 rows of prov2240 variable in pos2008 dataset :

      spec: |
neurologica |
          l |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,650       96.50       96.50
          N |        308        3.08       99.58
          Y |         42        0.42      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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