Frequencies for first 10,000 rows of rateeffectivedate variable in rate2018 dataset :

       Rate |
  Effective |
       Date |      Freq.     Percent        Cum.
------------+-----------------------------------
 2017-07-01 |         43        0.43        0.43
 2018-01-01 |      3,418       34.18       34.61
 2018-04-01 |      2,194       21.94       56.55
 2018-07-01 |      2,151       21.51       78.06
 2018-10-01 |      2,194       21.94      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 23 May 2018