| United States Treasury Bonds 4.75%
| - | 4.26% | - | - | 227,134,000 |
| United States Treasury Bonds 4.75%
| - | 4.21% | - | - | 227,109,000 |
| United States Treasury Bonds 4.625%
| - | 4.18% | - | - | 227,083,000 |
| United States Treasury Bonds 4.625%
| - | 4.17% | - | - | 227,156,000 |
| United States Treasury Bonds 4.625%
| - | 4.12% | - | - | 227,143,000 |
| United States Treasury Bonds 4.5%
| - | 4.09% | - | - | 227,188,000 |
| United States Treasury Bonds 4.75%
| - | 4.08% | - | - | 218,049,000 |
| United States Treasury Bonds 4.25%
| - | 3.87% | - | - | 227,206,000 |
| United States Treasury Bonds 4.25%
| - | 3.87% | - | - | 227,158,000 |
| United States Treasury Bonds 4.125%
| - | 3.50% | - | - | 209,707,000 |