Frequencies for chainstate variable in hcris2552_96_2003 dataset :

 chainstate |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      6,188       99.92       99.92
         CA |          1        0.02       99.94
         LA |          1        0.02       99.95
         MI |          1        0.02       99.97
         OH |          1        0.02       99.98
         TX |          1        0.02      100.00
------------+-----------------------------------
      Total |      6,193      100.00

by Jean Roth , jroth@nber.org , 8 Sep 2018