| United States Treasury Bonds 4.75%
| - | 4.24% | - | - | 238,827,000 |
| United States Treasury Bonds 4.75%
| - | 4.17% | - | - | 237,735,000 |
| United States Treasury Bonds 4.625%
| - | 4.15% | - | - | 238,899,000 |
| United States Treasury Bonds 4.625%
| - | 4.14% | - | - | 237,749,000 |
| United States Treasury Bonds 4.625%
| - | 4.10% | - | - | 238,886,000 |
| United States Treasury Bonds 4.5%
| - | 4.06% | - | - | 238,881,000 |
| United States Treasury Bonds 4.75%
| - | 4.05% | - | - | 228,518,000 |
| United States Treasury Bonds 4.25%
| - | 3.85% | - | - | 238,899,000 |
| United States Treasury Bonds 4.25%
| - | 3.85% | - | - | 238,851,000 |
| United States Treasury Bonds 4.125%
| - | 3.44% | - | - | 217,948,000 |