Frequencies for first 10,000 rows of uld_precip variable in natl2010 dataset :

Precipitous |
  labor RFP |
718=f_uld_p |
  recip U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        273        2.73        2.73
          2 |      8,610       86.10       88.83
          9 |      1,117       11.17      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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