| Date | (US$ Billion) |
|---|---|
| 2018.08 | 459.88 |
| 2018.07 | 458.50 |
| 2018.06 | 457.12 |
| 2018.05 | 457.28 |
| 2018.04 | 457.13 |
| 2018.03 | 457.19 |
| 2018.02 | 456.72 |
| 2018.01 | 455.72 |
| 2017.12 | 451.50 |
| 2017.11 | 450.47 |
| 2017.10 | 447.79 |
| 2017.09 | 447.22 |
| 2017.08 | 446.43 |
| 2017.07 | 444.45 |
| 2017.06 | 441.94 |
| 2017.05 | 440.25 |
| 2017.04 | 438.43 |
| 2017.03 | 437.53 |
| 2017.02 | 437.66 |
| 2017.01 | 436.59 |
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