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

  Suspected |
Chromosonal |
   Disorder |
        RFP |
645=f_ca_ch |
      rom R |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      1,077       10.77       10.77
          C |          1        0.01       10.78
          N |      8,557       85.57       96.35
          P |          2        0.02       96.37
          U |        363        3.63      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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