Frequencies for first 10,000 rows of ca_disor variable in natl2015 dataset :

  Suspected |
Chromosomal |
 Disorder C |
  Confirmed |      Freq.     Percent        Cum.
------------+-----------------------------------
          C |          4        0.04        0.04
          N |      9,979       99.79       99.83
          P |         16        0.16       99.99
          U |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 20 Oct 2016