[Lokibob]

I agree and understand that, however if they use the thrusters to maintain position, there is less fuel available to maintain altitude. I wonder if that is the reason it is so low as shown in the chart. I seem to remember the altitude in 2001 in the 420-440 range.

[FreedomCalls]

if they use the thrusters to maintain position, there is less fuel available to maintain altitude.

That is true and it could be a problem down the road.