Frequencies for first 10,000 rows of totchron variable in namcs2008 dataset :

  total number of |
          chronic |
       conditions |      Freq.     Percent        Cum.
------------------+-----------------------------------
entire item blank |        171        1.71        1.71
                0 |      4,693       46.93       48.64
                1 |      2,182       21.82       70.46
                2 |      1,355       13.55       84.01
                3 |        908        9.08       93.09
                4 |        412        4.12       97.21
                5 |        183        1.83       99.04
                6 |         58        0.58       99.62
                7 |         25        0.25       99.87
                8 |          8        0.08       99.95
                9 |          5        0.05      100.00
------------------+-----------------------------------
            Total |     10,000      100.00

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