Frequencies for first 10,000 rows of castage variable in nhamcsopd2008 dataset :

      stage of |
     patient's |
        cancer |      Freq.     Percent        Cum.
---------------+-----------------------------------
       unknown |        282        2.82        2.82
not applicable |      9,324       93.24       96.06
       in situ |         54        0.54       96.60
         local |        150        1.50       98.10
      regional |         95        0.95       99.05
       distant |         95        0.95      100.00
---------------+-----------------------------------
         Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Mar 2016