Frequencies for first 10,000 rows of chyper variable in natl1995 dataset :

Hypertensio |
n - chronic |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         80        0.80        0.80
          2 |      9,877       98.77       99.57
          9 |         43        0.43      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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