Frequencies for first 10,000 rows of on_precip variable in natlterr2006 dataset :

Precipitous |
  Labor RFP |
606=f_on_pr |
     ecip R |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      6,275       62.75       62.75
          N |      3,694       36.94       99.69
          U |          1        0.01       99.70
          Y |         30        0.30      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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