Frequencies for first 10,000 rows of rgn_cd variable in pos2005 dataset :

region code |      Freq.     Percent        Cum.
------------+-----------------------------------
         04 |      1,751       17.51       17.51
         06 |      1,830       18.30       35.81
         09 |      6,179       61.79       97.60
         10 |        240        2.40      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 17 May 2017