Method 1 - summary of exhaustion dates
Best case (late exhaustion)
- 2014 ( for 83 x /8s ) (very long extrapolation)
- 2017 ( for 107 x /8s ) (very long extrapolation)
Most likely case
- Q3 2006 ( for 83 x /8s ) (extrapolation)
- Q1 2007 ( for 107 x /8s ) (extrapolation)
Worst case (early exhaustion)
- mid 2005 ( for 83 x /8s ) (short extrapolation)
- mid 2006 ( for 107 x /8s ) (short extrapolation)