Frequencies for first 10,000 rows of rgn_cd variable in pos2000 dataset :

region code |      Freq.     Percent        Cum.
------------+-----------------------------------
         04 |      1,525       15.25       15.25
         06 |      1,614       16.14       31.39
         09 |      6,657       66.57       97.96
         10 |        204        2.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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