Frequencies for first 10,000 rows of prov2240 variable in pos2010 dataset :

      SPEC: |
NEUROLOGICA |
          L |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,632       96.32       96.32
          N |        328        3.28       99.60
          Y |         40        0.40      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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