Frequencies for first 10,000 rows of op_precip variable in natlterr2011 dataset :

Precipitous |
  Labor RFP |
606=f_ol_pr |
     ecip R |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      2,536       25.36       25.36
          N |      6,272       62.72       88.08
          U |      1,126       11.26       99.34
          Y |         66        0.66      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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