Frequencies for first 10,000 rows of planeffictivedate variable in plan2015 dataset :

       Plan |
  Effective |
       Date |      Freq.     Percent        Cum.
------------+-----------------------------------
 2014-01-01 |         14        0.14        0.14
 2015-01-01 |      9,986       99.86      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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