Frequencies for first 10,000 rows of chyper variable in natl2002 dataset :

Hypertensio |
n - chronic |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         89        0.89        0.89
          2 |      9,598       95.98       96.87
          9 |        313        3.13      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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