I am looking at 3 different jerseys. They do not have year tags on any of them and the wash tags are as follows:

2005 jersey with wash tag of 0062 0435C2
2006 jersey with wash tag of 0062 1112H1
2007 jersey with wash tag of only 0062

My questions are when did they start putting year tags? Are there instances where year tags are not present? What are the codes after the 0062 and when did these first appear? I am trying to verify the wash tags for each jersey and am trying to get in touch with someone at Majestic for more info. Thanks fellow collectors for any info you can provide!