Frequencies for measurestartdatestr variable in hqi_national_payment dataset :

    Measure |
 start date |      Freq.     Percent        Cum.
------------+-----------------------------------
 07/01/2011 |          3      100.00      100.00
------------+-----------------------------------
      Total |          3      100.00

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