| United States Treasury Bonds 4.75%
| - | 4.23% | - | - | 238,045,000 |
| United States Treasury Bonds 4.75%
| - | 4.16% | - | - | 237,330,000 |
| United States Treasury Bonds 4.625%
| - | 4.14% | - | - | 238,116,000 |
| United States Treasury Bonds 4.625%
| - | 4.13% | - | - | 237,344,000 |
| United States Treasury Bonds 4.625%
| - | 4.09% | - | - | 238,103,000 |
| United States Treasury Bonds 4.5%
| - | 4.06% | - | - | 238,099,000 |
| United States Treasury Bonds 4.75%
| - | 4.04% | - | - | 227,789,000 |
| United States Treasury Bonds 4.25%
| - | 3.84% | - | - | 238,069,000 |
| United States Treasury Bonds 4.25%
| - | 3.84% | - | - | 238,117,000 |
| United States Treasury Bonds 4.125%
| - | 3.44% | - | - | 217,470,000 |