Frequencies for first 10,000 rows of xostate variable in natl2003 dataset :

   Expanded |
 Occurrence |
  State U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
         AK |      9,991       99.91       99.91
         AL |          9        0.09      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Dec 2015