Frequencies for first 10,000 rows of XTRCRPRL_SHCK_LTHTRPTR_SRVC_CD variable in pos2011 dataset :

   Services |
  Provided: |
Extracorpor |
  eal Shock |
       Wave |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,614       86.14       86.14
          0 |      1,271       12.71       98.85
          1 |         26        0.26       99.11
          2 |         58        0.58       99.69
          3 |         31        0.31      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 19 Apr 2019