Frequencies for first 10,000 rows of rgn_cd variable in pos2010 dataset :

REGION CODE |      Freq.     Percent        Cum.
------------+-----------------------------------
         04 |      1,908       19.08       19.08
         06 |      1,962       19.62       38.70
         09 |      5,868       58.68       97.38
         10 |        262        2.62      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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