Frequencies for first 10,000 rows of rcvshot variable in h126f dataset :

 THIS VISIT |
      DID P |
 RECEIVE AN |
    ALLERGY |
       SHOT |      Freq.     Percent        Cum.
------------+-----------------------------------
         -9 |        348        3.48        3.48
         -8 |         28        0.28        3.76
         -1 |         64        0.64        4.40
          1 |         12        0.12        4.52
          2 |      3,214       32.14       36.66
         95 |      6,334       63.34      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 27 Feb 2018