Solaris update vs release

On many occasions while planning for upgrades, or installations, I need to install a certain Solaris update, for example Solaris 10 update 3. When you download Solaris you can download Solaris by release date. It is sometimes difficult to find this mapping.

I have tried my best to compile an accurate mapping as follows;
Solaris 10 – initial release 1/05
u1    1/06
u2    6/06
u3    11/06
u4    8/07
u5    5/08
u6    10/08
u7    5/09
u8    10/09
u9    9/10
u10    8/11