Frequencies for yearrange variable in pchsa2003_2007 dataset :

 Year Range |      Freq.     Percent        Cum.
------------+-----------------------------------
  2003_2007 |      3,437      100.00      100.00
------------+-----------------------------------
      Total |      3,437      100.00

by Jean Roth , jroth@nber.org , 14 Mar 2018