Frequencies for first 10,000 rows of uld_precip variable in natl2008 dataset :

Precipitous |
  labor RFP |
718=f_uld_p |
  recip U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        132        1.32        1.32
          2 |      9,865       98.65       99.97
          9 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 3 May 2016