Frequencies for first 10,000 rows of totchron variable in namcs2011 dataset :

  Total number of |
          chronic |
       conditions |      Freq.     Percent        Cum.
------------------+-----------------------------------
Entire item blank |        176        1.76        1.76
                0 |      4,530       45.30       47.06
                1 |      2,141       21.41       68.47
                2 |      1,336       13.36       81.83
                3 |        910        9.10       90.93
                4 |        510        5.10       96.03
                5 |        239        2.39       98.42
                6 |        108        1.08       99.50
                7 |         30        0.30       99.80
                8 |         18        0.18       99.98
                9 |          1        0.01       99.99
               13 |          1        0.01      100.00
------------------+-----------------------------------
            Total |     10,000      100.00

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