Frequencies for centerclassificationdate variable in enfrep20170517 dataset :

     Center |
Classificat |
   ion Date |      Freq.     Percent        Cum.
------------+-----------------------------------
 05/05/2017 |         25       32.47       32.47
 05/08/2017 |          9       11.69       44.16
 05/09/2017 |         12       15.58       59.74
 05/10/2017 |         18       23.38       83.12
 05/11/2017 |         13       16.88      100.00
------------+-----------------------------------
      Total |         77      100.00

by Jean Roth , jroth@nber.org , 18 May 2017