WaMu doesn't do cli requests and for me I beleive the pattern has been auto CLIs at following points:
-Started with $4k (providian at the time) ~ 70% UTL due to BT
-6 months - went to $5k ~ 60% UTL *at time of the auto cli
-9 months - went to $6k ~ 50% UTL
-12 months - went to $8k ~ 80% UTL
-18 months - went to $10k ~ 50% UTL (I think this is when it became a WaMu card rather than Prov)
-24 months - went to $11k ~ 30% UTL
-36 months - went to $12.5k ~ 2% UTL
I hope this is helpful. I always see the CLIs after the "annivsary" bill cycle. For example, I saw my 36 month CLI in my 37 month.