Frequencies for first 10,000 rows of cardiac variable in namcs2015 dataset :

    Cardiac |
stress test |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,951       99.51       99.51
          1 |         49        0.49      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 25 Oct 2017