Frequencies for first 10,000 rows of ume_vac variable in natlterr2013 dataset :

 Vacuum RFP |
735=f_u_vac |
        U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        116        1.16        1.16
          2 |      8,495       84.95       86.11
          9 |      1,389       13.89      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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