Frequencies for first 10,000 rows of rateeffectivedate variable in rate2016 dataset :

       Rate |
  Effective |
       Date |      Freq.     Percent        Cum.
------------+-----------------------------------
 2015-01-01 |        138        1.38        1.38
 2016-01-01 |      4,788       47.88       49.26
 2016-04-01 |      1,690       16.90       66.16
 2016-07-01 |      1,691       16.91       83.07
 2016-10-01 |      1,693       16.93      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 6 Oct 2016