Frequencies for start_datestr variable in hospital_quarterly_qualitymeasure_ipf

 Start Date |      Freq.     Percent        Cum.
------------+-----------------------------------
 04/01/2013 |         52      100.00      100.00
------------+-----------------------------------
      Total |         52      100.00

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