| Year | Balance | 
|---|---|
| 31 December 2021 | US$ 19.6 Billion | 
| 30 September 2021 | US$ 19.1 Billion | 
| 30 June 2021 | US$ 19.4 Billion | 
| 31 March 2021 | US$ 18.9 Billion | 
| Year | Balance | 
|---|---|
| 31 December 2021 | US$ 19.6 Billion | 
| 30 September 2021 | US$ 19.1 Billion | 
| 30 June 2021 | US$ 19.4 Billion | 
| 31 March 2021 | US$ 18.9 Billion |