| Country | Ascents | Between | |
|---|---|---|---|
| 1 | Australia π¦πΊ | 2 | 1st January 1981 β 1st January 1985 |
| 2 | United Kingdom π¬π§ | 2 | 1st January 1980 β 1st January 1985 |
| 3 | USA πΊπΈ | 2 | 1st January 1980 β 1st January 1981 |
4 ascents could not be assigned to a country.