What's the mean "check=" result from output using "show access-list"?

I didn't find documents on the Cisco website related to this problem...

Please, Tell me the mean...

thanks.



Cat3550#sh ip access-lists

Standard IP access list v70
permit 192.168.70.152 (565 matches)
permit 192.168.70.159 (219 matches)
permit 192.168.70.151 (216 matches)
permit 192.168.70.99 check=4
permit 192.168.70.181 (338 matches)
permit 192.168.70.60 check=2
permit 192.168.70.187 (546 matches)
permit 192.168.70.177 (145 matches)