Frequencies for first 10,000 rows of uld_precip variable in natl2006 dataset :

Precipitous |
  labor RFP |
718=f_uld_p |
  recip U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        400        4.00        4.00
          2 |      9,468       94.68       98.68
          9 |        132        1.32      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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