Frequencies for measurestartdate variable in hqi_national_readmdeath dataset :

    Measure |
 Start Date |      Freq.     Percent        Cum.
------------+-----------------------------------
  01jul2011 |         13       92.86       92.86
  01jul2013 |          1        7.14      100.00
------------+-----------------------------------
      Total |         14      100.00

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