Frequencies for first 10,000 rows of therpr2 variable in nhamcsopd1998 dataset :

      other |
therapeutic |
/preventive |
 service #2 |      Freq.     Percent        Cum.
------------+-----------------------------------
       0000 |     10,000      100.00      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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