Frequencies for first 10,000 rows of ct_scan_srvc_cd variable in pos2012 datase

   Services |
  Provided: |
 CT Scanner |      Freq.     Percent        Cum.
------------+-----------------------------------
          . |      8,606       86.06       86.06
          0 |        968        9.68       95.74
          1 |        330        3.30       99.04
          2 |         65        0.65       99.69
          3 |         31        0.31      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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