Frequencies for first 10,000 rows of uld_precip variable in natl2013 dataset :

Precipitous |
  labor RFP |
718=f_uld_p |
  recip U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        529        5.29        5.29
          2 |      8,992       89.92       95.21
          9 |        479        4.79      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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