Hi David R,
I forgot to include that the above "stats" are based on the following assumptions:
1. Everyone starts from shodan
2. No one skips ranks
3. Every yudansha is issued with a certificate for every rank taken.
4. Everyone given the ranks are still living (not possible)
PS. Only if Aikikai Hombu has an established databank assessible via the Net, then, you can put the names behind the numbers