Frequencies for first 10,000 rows of chow_cnt variable in posclia2018 dataset :

 CHOW Count |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,970       99.70       99.70
          1 |         12        0.12       99.82
          2 |         14        0.14       99.96
          3 |          1        0.01       99.97
          4 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 15 Feb 2019