Frequencies for first 10,000 rows of me_attv variable in natlterr2009 dataset :

  Attempted |
 Vacuum RFP |
618=f_md_at |
     tvac R |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      2,449       24.49       24.49
          N |      7,335       73.35       97.84
          U |          2        0.02       97.86
          Y |        214        2.14      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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