Im interested to know when each of the major promotions began broadcasting their PPVs/events in widescreen.

Since I joined mma-torrents ive been trying to complete my collection of UFC and Pride events and based on that:

The earliest UFC event I have in widescreen is UFC 72: Victory
The earliest Pride event I have in widescreen is Pride 31: Unbreakable/Dreamers
Unsure about Strikeforce, WEC, others.

Does anyone have any information on this?

I think this would be good for reference