Frequencies for first 10,000 rows of chyper variable in natl1998 dataset :

Hypertensio |
n - chronic |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        115        1.15        1.15
          2 |      9,885       98.85      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Dec 2015