Frequencies for first 10,000 rows of ume_vac variable in natlterr2010 dataset :

 Vacuum RFP |
735=f_u_vac |
        U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        100        1.00        1.00
          2 |      8,637       86.37       87.37
          9 |      1,263       12.63      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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