Frequencies for first 10,000 rows of pet_scan_srvc_cd variable in pos2018 dataset :

  Services: |
   PET Scan |
       Code |      Freq.     Percent        Cum.
------------+-----------------------------------
          . |      8,560       85.60       85.60
          0 |      1,273       12.73       98.33
          1 |         75        0.75       99.08
          2 |         69        0.69       99.77
          3 |         23        0.23      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 15 Feb 2019