Frequencies for first 10,000 rows of regnres variable in natl1990 dataset :

  Region of |
  Residence |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |          2        0.02        0.02
          1 |          3        0.03        0.05
          2 |          5        0.05        0.10
          3 |      9,989       99.89       99.99
          4 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 3 Jan 2016