Frequencies for measurestartdatestr variable in hqi_state_img_avg dataset :

    Measure |
 Start Date |      Freq.     Percent        Cum.
------------+-----------------------------------
 07/01/2013 |        336      100.00      100.00
------------+-----------------------------------
      Total |        336      100.00

by Jean Roth , jroth@nber.org , 16 Nov 2016