| United States Treasury Bonds 4.75%
| - | 4.30% | - | - | 226,776,000 |
| United States Treasury Bonds 4.75%
| - | 4.24% | - | - | 226,779,000 |
| United States Treasury Bonds 4.625%
| - | 4.21% | - | - | 226,805,000 |
| United States Treasury Bonds 4.625%
| - | 4.16% | - | - | 226,838,000 |
| United States Treasury Bonds 4.625%
| - | 4.09% | - | - | 223,125,000 |
| United States Treasury Bonds 4.5%
| - | 4.07% | - | - | 226,833,000 |
| United States Treasury Bonds 4.75%
| - | 4.07% | - | - | 217,529,000 |
| United States Treasury Bonds 4.25%
| - | 3.95% | - | - | 226,841,000 |
| United States Treasury Bonds 4.25%
| - | 3.95% | - | - | 226,834,000 |
| United States Treasury Bonds 4.125%
| - | 3.55% | - | - | 208,418,000 |