VMI/VMIR Differential Chart <pre> VMI VMIR Differential 1/5/2007 0.74% 0.74% 0.00% 1/12/2007 1.77% 1.77% 0.00% 1/19/2007 2.75% 2.75% 0.00% 1/26/2007 5.00% 5.00% 0.00% 2/2/2007 7.85% 8.26% 0.41% 2/9/2007 11.11% 12.53% 1.42% 2/16/2007 13.60% 14.59% 0.99% 2/23/2007 15.34% 16.84% 1.50% 3/2/2007 9.18% 10.68% 1.50% 3/9/2007 9.94% 12.91% 2.97% 3/16/2007 9.70% 13.84% 4.14% 3/23/2007 14.20% 18.70% 4.50% 3/30/2007 13.02% 17.12% 4.10% 4/5/2007 15.60% 20.63% 5.03% 4/13/2007 17.72% 24.06% 6.34% 4/20/2007 19.25% 26.16% 6.91% 4/27/2007 23.54% 28.44% 4.90% 5/4/2007 24.44% 29.99% 5.55% 5/11/2007 24.26% 33.15% 8.89% 5/18/2007 20.62% 29.72% 9.10% 5/25/2007 21.00% 28.78% 7.78% 6/1/2007 22.38% 29.68% 7.30% 6/8/2007 21.08% 27.98% 6.90% 6/15/2007 23.68% 30.75% 7.07% 6/22/2007 27.70% 35.40% 7.70% 6/29/2007 25.98% 34.58% 8.60% 7/6/2007 30.65% 39.79% 9.14% 7/13/2007 32.86% 45.66% 12.80% 7/20/2007 34.20% 48.68% 14.48% 7/27/2007 24.91% 38.19% 13.28% 8/3/2007 20.14% 36.64% 16.50% 8/10/2007 16.97% 33.47% 16.50% 8/17/2007 11.53% 28.89% 17.36% 8/24/2007 14.11% 37.24% 23.13% 8/31/2007 14.35% 36.65% 22.30% 9/7/2007 15.53% 40.00% 24.47% 9/14/2007 16.86% 39.82% 22.96% 9/21/2007 20.89% 52.06% 31.17% 9/28/2007 25.57% 57.16% 31.59% 10/5/2007 35.84% 63.63% 27.79% 10/12/2007 36.71% 67.57% 30.86% 10/19/2007 34.72% 65.93% 31.21% 10/26/2007 39.51% 68.58% 29.07% 11/2/2007 38.07% 70.32% 32.25% 11/9/2007 29.60% 61.94% 32.34% 11/16/2007 20.77% 51.60% 30.83% 11/23/2007 13.11% 42.42% 29.31% 11/30/2007 16.32% 48.78% 32.46% 12/7/2007 17.69% 54.43% 36.74% 12/14/2007 13.85% 49.28% 35.43% 12/21/2007 12.30% 48.96% 36.66% 12/28/2007 15.58% 53.82% 38.24% 12/31/2007 16.78% 56.16% 39.38% </pre>