Frequencies for first 10,000 rows of pet_scan_srvc_cd variable in pos2005 dataset :

   srv: pet |
       scan |
   services |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,731       87.31       87.31
          0 |      1,263       12.63       99.94
          2 |          4        0.04       99.98
          3 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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