| United States Treasury Bonds 4.75%
| - | 4.23% | - | - | 238,389,000 |
| United States Treasury Bonds 4.75%
| - | 4.16% | - | - | 237,698,000 |
| United States Treasury Bonds 4.625%
| - | 4.14% | - | - | 238,452,000 |
| United States Treasury Bonds 4.625%
| - | 4.13% | - | - | 237,712,000 |
| United States Treasury Bonds 4.625%
| - | 4.09% | - | - | 238,439,000 |
| United States Treasury Bonds 4.5%
| - | 4.06% | - | - | 238,443,000 |
| United States Treasury Bonds 4.75%
| - | 4.04% | - | - | 228,109,000 |
| United States Treasury Bonds 4.25%
| - | 3.84% | - | - | 238,461,000 |
| United States Treasury Bonds 4.25%
| - | 3.84% | - | - | 238,413,000 |
| United States Treasury Bonds 4.125%
| - | 3.44% | - | - | 217,774,000 |