| United States Treasury Bonds 4.75%
| - | 4.13% | - | - | 245,060,000 |
| United States Treasury Bonds 4.75%
| - | 4.11% | - | - | 243,946,000 |
| United States Treasury Bonds 4.75%
| - | 4.08% | - | - | 245,208,000 |
| United States Treasury Bonds 4.625%
| - | 4.04% | - | - | 245,246,000 |
| United States Treasury Bonds 4.625%
| - | 4.00% | - | - | 245,074,000 |
| United States Treasury Bonds 4.625%
| - | 3.99% | - | - | 245,259,000 |
| United States Treasury Bonds 4.5%
| - | 3.91% | - | - | 245,273,000 |
| United States Treasury Bonds 4.75%
| - | 3.89% | - | - | 234,582,000 |
| United States Treasury Bonds 4.25%
| - | 3.80% | - | - | 245,280,000 |
| United States Treasury Bonds 4.25%
| - | 3.80% | - | - | 245,232,000 |