| United States Treasury Bonds 4.75%
| - | 4.23% | - | - | 239,204,000 |
| United States Treasury Bonds 4.75%
| - | 4.17% | - | - | 238,688,000 |
| United States Treasury Bonds 4.625%
| - | 4.14% | - | - | 239,264,000 |
| United States Treasury Bonds 4.625%
| - | 4.14% | - | - | 238,702,000 |
| United States Treasury Bonds 4.625%
| - | 4.09% | - | - | 239,251,000 |
| United States Treasury Bonds 4.5%
| - | 4.06% | - | - | 239,258,000 |
| United States Treasury Bonds 4.75%
| - | 4.04% | - | - | 228,875,000 |
| United States Treasury Bonds 4.25%
| - | 3.84% | - | - | 239,276,000 |
| United States Treasury Bonds 4.25%
| - | 3.84% | - | - | 239,228,000 |
| United States Treasury Bonds 4.125%
| - | 3.44% | - | - | 219,021,000 |