| United States Treasury Bonds 4.75%
| - | 4.23% | - | - | 227,800,000 |
| United States Treasury Bonds 4.75%
| - | 4.19% | - | - | 227,801,000 |
| United States Treasury Bonds 4.625%
| - | 4.15% | - | - | 227,859,000 |
| United States Treasury Bonds 4.625%
| - | 4.14% | - | - | 226,901,000 |
| United States Treasury Bonds 4.625%
| - | 4.10% | - | - | 227,826,000 |
| United States Treasury Bonds 4.5%
| - | 4.06% | - | - | 227,854,000 |
| United States Treasury Bonds 4.75%
| - | 4.05% | - | - | 218,066,000 |
| United States Treasury Bonds 4.25%
| - | 3.85% | - | - | 227,862,000 |
| United States Treasury Bonds 4.25%
| - | 3.85% | - | - | 227,844,000 |
| United States Treasury Bonds 4.125%
| - | 3.45% | - | - | 208,427,000 |