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

   Facility |
      Group |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      1,646       16.46       16.46
          2 |      4,634       46.34       62.80
          3 |      1,030       10.30       73.10
          4 |        171        1.71       74.81
          5 |      1,859       18.59       93.40
          6 |        156        1.56       94.96
          7 |        267        2.67       97.63
          8 |        146        1.46       99.09
          9 |         90        0.90       99.99
          . |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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