Frequencies for first 10,000 rows of castage variable in nhamcsopd2006 dataset :

   what is the |
      stage of |
     patient's |
       cancer? |      Freq.     Percent        Cum.
---------------+-----------------------------------
       In situ |         49        0.49        0.49
         Local |        152        1.52        2.01
      Regional |         73        0.73        2.74
       Distant |         98        0.98        3.72
       Unknown |        329        3.29        7.01
Not applicable |      9,299       92.99      100.00
---------------+-----------------------------------
         Total |     10,000      100.00

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