Frequencies for ins_hcc157 variable in hcccoefn dataset :

  vertebral |
  fractures |
    without |
spinal cord |
     injury |      Freq.     Percent        Cum.
------------+-----------------------------------
       .154 |          1      100.00      100.00
------------+-----------------------------------
      Total |          1      100.00

by Jean Roth , jroth@nber.org , 2 May 2016