Countries Where More Than a 30% Identify as Agnostics

I) In the Americas
II) In Africa
III) In Europe
IV) In Asia
V) In Oceania
IV) Source

In the Americas:

No country has over 30% Agnostics, however Canada has the highest at about 24%.

In Africa:

No country has over 30% Agnostics, however South Africa has the most with 15%.

In Europe:

Czech Republic: Over 50%.

Netherlands: Over 42%

Sweden: Over 30%.

In Asia:

Vietnam: Over 75%
China: Over 52%
Japan: Over 30%

In Oceania:

New Zealand: Over 38.5%

Source: 

Index Mundi