__Figure 7: Total NPV - Baseline Scenario: SH/RA50/B1991;
3% and 7% Discount Rates__

The figure shows two S-shaped
curves that compare the likely NPV for the baseline scenario of SH/RA50/B1991
at 3% and 7 % discount rates. The *x* axis is labeled "Net Present Value
(billions $)" and the *y* axis is labeled "Probability of Not Exceeding."
The S-shaped curve for the 7% discount rate is on the left-hand side of the
Figure. For the S-shaped curve at the 7% discount rate, the NPV at 10%
probability is $ 4.7 billion, the NPV at 50% probability is $ 7.6 billion, and
the NPV at 90% probability is $ 11 billion. The S-shaped curve for the 3%
discount rate is on the right-hand side of the Figure. For the S-shaped curve
at the 3% discount rate, the NPV at 10% probability is $ 23.2 billion, the NPV
at 50% probability is $ 31.4 billion, and the NPV at 90% probability is $ 40.6
billion.