Well since we were talking about energy I thought you could find that out with out me having to spell it out for you.
Your infomation states that in 2000, 46% of BC exports on power were to California. However, it does not state how much of BC power makes up the total power used by California. Just because BC shipped 46% of its exported power to CA, doesn't mean that the power accounted for 46% of Californias total power needs.