Frequencies for first 10,000 rows of ume_vac variable in natlterr2006 dataset :

 Vacuum RFP |
735=f_u_vac |
        U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        152        1.52        1.52
          2 |      8,388       83.88       85.40
          9 |      1,460       14.60      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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