Frequencies for first 10,000 rows of prov1725 variable in pos1988 dataset :

     Region |      Freq.     Percent        Cum.
------------+-----------------------------------
          4 |      1,111       11.11       11.11
          6 |        875        8.75       19.86
          8 |        814        8.14       28.00
          9 |      7,052       70.52       98.52
         10 |        147        1.47       99.99
          . |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 26 Jan 2016