Open Question: Does anyone Know wal-marts Attendance policy?

My first missed day was in Sept 2009, I missed some in like novemeber and december because of the snow. My last missed day was Feburary 12th 2010. My manager pulled me into the office and said I was at my six day. one more I will have a D day. Do you know if any of them would have fallen off my record by now? or when do they?