Frequencies for first 10,000 rows of totchron variable in namcs2012 dataset :

  Total number of |
          chronic |
       conditions |      Freq.     Percent        Cum.
------------------+-----------------------------------
Entire item blank |        360        3.60        3.60
                0 |      4,500       45.00       48.60
                1 |      2,326       23.26       71.86
                2 |      1,325       13.25       85.11
                3 |        808        8.08       93.19
                4 |        395        3.95       97.14
                5 |        205        2.05       99.19
                6 |         53        0.53       99.72
                7 |         21        0.21       99.93
                8 |          5        0.05       99.98
                9 |          1        0.01       99.99
               10 |          1        0.01      100.00
------------------+-----------------------------------
            Total |     10,000      100.00

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