Frequencies for first 10,000 rows of admit variable in nhamcsed2009 dataset :

if admitted |
to hospital |
        was |
   checked, |
   admitted |
        to: |      Freq.     Percent        Cum.
------------+-----------------------------------
         -9 |         19        0.19        0.19
         -8 |        142        1.42        1.61
         -7 |      8,552       85.52       87.13
          1 |        166        1.66       88.79
          2 |        312        3.12       91.91
          3 |         72        0.72       92.63
          4 |         98        0.98       93.61
          5 |         10        0.10       93.71
          6 |        629        6.29      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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