| United States Treasury Bonds 4.75%
| - | 4.27% | - | - | 230,425,000 |
| United States Treasury Bonds 4.75%
| - | 4.22% | - | - | 230,339,000 |
| United States Treasury Bonds 4.625%
| - | 4.19% | - | - | 230,313,000 |
| United States Treasury Bonds 4.625%
| - | 4.18% | - | - | 230,447,000 |
| United States Treasury Bonds 4.625%
| - | 4.13% | - | - | 230,434,000 |
| United States Treasury Bonds 4.5%
| - | 4.10% | - | - | 230,479,000 |
| United States Treasury Bonds 4.75%
| - | 4.07% | - | - | 220,029,000 |
| United States Treasury Bonds 4.25%
| - | 3.88% | - | - | 230,497,000 |
| United States Treasury Bonds 4.25%
| - | 3.88% | - | - | 230,449,000 |
| United States Treasury Bonds 4.125%
| - | 3.47% | - | - | 210,106,000 |