Frequencies for first 10,000 rows of medtech variable in nhamcsopd2002 dataset :

   med tech |
       seen |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,539       95.39       95.39
          1 |        461        4.61      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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