_dta:
  1.  by Jean Roth , jroth@nber.org , 1 Dec 2015

  obs:        46,127                          
 vars:             4                          1 Dec 2015 08:46
 size:       322,889                          (_dta has notes)
---------------------------------------------------------------------------------------------------------------
              storage   display    value
variable name   type    format     label      variable label
---------------------------------------------------------------------------------------------------------------
state           byte    %8.0g                 state number
st_case         long    %12.0g                consecutive number
veh_no          byte    %8.0g                 vehicle number
drimpair        byte    %8.0g                 condition (impairment) at time of crash
---------------------------------------------------------------------------------------------------------------
Sorted by: st_case  veh_no  drimpair