| United States Treasury Bonds 4.75%
| - | 4.17% | - | - | 246,586,000 |
| United States Treasury Bonds 4.75%
| - | 4.14% | - | - | 244,583,000 |
| United States Treasury Bonds 4.75%
| - | 4.09% | - | - | 244,655,000 |
| United States Treasury Bonds 4.625%
| - | 4.05% | - | - | 244,693,000 |
| United States Treasury Bonds 4.625%
| - | 4.01% | - | - | 244,597,000 |
| United States Treasury Bonds 4.625%
| - | 4.00% | - | - | 244,706,000 |
| United States Treasury Bonds 4.5%
| - | 3.92% | - | - | 244,720,000 |
| United States Treasury Bonds 4.75%
| - | 3.92% | - | - | 234,898,000 |
| United States Treasury Bonds 4.25%
| - | 3.81% | - | - | 244,727,000 |
| United States Treasury Bonds 4.25%
| - | 3.80% | - | - | 244,679,000 |