Frequencies for measurestartdate variable in hqi_state_readmdeath dataset :

    Measure |
 Start Date |      Freq.     Percent        Cum.
------------+-----------------------------------
  01jul2012 |        728       92.86       92.86
  01jul2014 |         56        7.14      100.00
------------+-----------------------------------
      Total |        784      100.00

by Jean Roth , jroth@nber.org , 15 Nov 2016