Frequencies for first 10,000 rows of uld_precip variable in natlterr2008 dataset :

Precipitous |
  labor RFP |
718=f_uld_p |
  recip U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         46        0.46        0.46
          2 |      8,606       86.06       86.52
          9 |      1,348       13.48      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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