| United States Treasury Bonds 4.75%
| - | 4.27% | - | - | 230,781,000 |
| United States Treasury Bonds 4.75%
| - | 4.22% | - | - | 230,737,000 |
| United States Treasury Bonds 4.625%
| - | 4.19% | - | - | 230,711,000 |
| United States Treasury Bonds 4.625%
| - | 4.18% | - | - | 230,803,000 |
| United States Treasury Bonds 4.625%
| - | 4.13% | - | - | 230,790,000 |
| United States Treasury Bonds 4.5%
| - | 4.10% | - | - | 230,835,000 |
| United States Treasury Bonds 4.75%
| - | 4.08% | - | - | 220,559,000 |
| United States Treasury Bonds 4.25%
| - | 3.88% | - | - | 230,853,000 |
| United States Treasury Bonds 4.25%
| - | 3.88% | - | - | 230,805,000 |
| United States Treasury Bonds 4.125%
| - | 3.48% | - | - | 211,182,000 |