| Country | Ascents | Between | |
|---|---|---|---|
| 1 | United Kingdom π¬π§ | 141 | 1st January 1971 β 17th March 1999 |
| 2 | New Zealand π³πΏ | 13 | 1st January 1977 β 1st January 1980 |
| 3 | Australia π¦πΊ | 3 | 1st January 1979 β 1st January 1980 |
| 4 | USA πΊπΈ | 3 | 1st January 1981 β 1st January 1981 |
3 ascents could not be assigned to a country.