Currently 66% of Brent price -This is what BNK receives NOW.
It is true the percentage was lower in past years - but the discount to light sweet crude has been shrinking over the years due to the fact the demand from refineries for heavy crude has grown.
Much of the worlds available - easily accessed - light crude has long since been used up.
The current price BNK receives is 66% and could easily go higher for the reasons given above.
The fact that BNK once received 6 or,62% - and the past few years average is 63% is history - and has no bearing on their situation today.
Personally I dont count my income as being whatever it was 10 years ago - my interest is what it is today !