Frequencies for first 10,000 rows of pldel variable in natl1996 dataset :

   Place or |
Facility of |
      Birth |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      9,977       99.77       99.77
          2 |          3        0.03       99.80
          4 |         18        0.18       99.98
          5 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Dec 2015