224 members in 66 countries covering eight regions:
Pacific, Asia (South-East, North, South, Central), Middle East, North Africa and North America.
- Full Members:Â 50 in 39 countries
- Additional Full Members:Â 61 in 32 countries
- Associate Members: 38 in 24 countries
- Affiliate Members: 67 in 28 countries
- Institutional Members: 8 in 5 countries
