Frequencies for first 10,000 rows of totchron variable in namcs2010 dataset :

  total number of |
          chronic |
       conditions |      Freq.     Percent        Cum.
------------------+-----------------------------------
entire item blank |        127        1.27        1.27
                0 |      4,857       48.57       49.84
                1 |      2,226       22.26       72.10
                2 |      1,275       12.75       84.85
                3 |        860        8.60       93.45
                4 |        419        4.19       97.64
                5 |        175        1.75       99.39
                6 |         48        0.48       99.87
                7 |         11        0.11       99.98
                8 |          2        0.02      100.00
------------------+-----------------------------------
            Total |     10,000      100.00

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