How do they come up with "Basic Electricity" usage?

As you all know I have been working on bringing my electric bill down. I got my recent bill and it stated 2 years ago my daily usage was 76.32, last year it was 68.93 and this year it is 49.66 and yet even with this reduction I am STILL in the top 5 tier??

How is this possible? Do I need to change to candles and a wood stove?

Oh and I have different sections on my bill - "Delivery" Charge and "Generation" Charge I guess a basic (bend u over with lube) and (bend u over more without lube) charges which have different numbers in the SAME tier??

Basic "Delivery" charge Tier 1 is 326 kWh or 10.18 kWh a day and
Basic "Generation" charge Tier 1 is 251 kWh or 7.84 kWh a day

I WANT TO KNOW WHO COMES UP WITH THE "BASIC" NUMBER - HOW IS IT BROKEN DOWN? WHEN WAS THE LAST TIME IT WAS UPDATED? I WOULD LIKE SOME FREAKING ANSWERS PLEASE CAUSE THIS IS JUST WRONG!