They had their own strategies and it would be foolish to think that they didn't have thier own desires and knowledge. They were choosing the European powers which they thought would serve their cause, that is why some supported one European power and the others supported another European power. Their role was great because they knew the ground well.
If you mean polio then <span>it dropped by 6000 in 1962 or the first year when the vaccine was released</span>
Bill of Rights is the right answer
The Dutch bought Manhattan Island in 1626. Hope this helps! :)