| United States Treasury Bonds 4.75%
| - | 4.27% | - | - | 230,094,000 |
| United States Treasury Bonds 4.75%
| - | 4.22% | - | - | 230,050,000 |
| United States Treasury Bonds 4.625%
| - | 4.18% | - | - | 230,024,000 |
| United States Treasury Bonds 4.625%
| - | 4.18% | - | - | 230,116,000 |
| United States Treasury Bonds 4.625%
| - | 4.13% | - | - | 230,103,000 |
| United States Treasury Bonds 4.5%
| - | 4.09% | - | - | 230,148,000 |
| United States Treasury Bonds 4.75%
| - | 4.08% | - | - | 220,475,000 |
| United States Treasury Bonds 4.25%
| - | 3.88% | - | - | 230,166,000 |
| United States Treasury Bonds 4.25%
| - | 3.88% | - | - | 230,118,000 |
| United States Treasury Bonds 4.125%
| - | 3.49% | - | - | 211,398,000 |