In 2021 the total membership recovered from the worst impacts caused by Covid – up 6% on last year’s numbers at around 4250 members in 130 countries, distributed across the world’s regions.
| REGION | 2021 |
| Sub-Saharan Africa | 353 |
| North Africa and the Middle East | 146 |
| Asia | 421 |
| Australasia and the Pacific | 644 |
| Eastern Europe and Central Asia | 156 |
| North America | 558 |
| Latin America and the Caribbean | 237 |
| Western Europe | 1726 |
| Total | 4241 |