Frequencies for first 10,000 rows of op_precip variable in natlterr2007 dataset :

Precipitous |
  Labor RFP |
606=f_ol_pr |
     ecip R |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      6,163       61.63       61.63
          N |      3,804       38.04       99.67
          U |          1        0.01       99.68
          Y |         32        0.32      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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