It is best to place the "annually" at the start, because it then applies unambiguously to both groups:
- "Annually, one American consumes ....**
Please also note that "as much amount" is incorrect. The phrase should be:
- "... about the same amount as ..".
Further, to be technically correct, you should refer to the figures as being averages, although you then need to check what type of average.
Overall, some possible rephrasings would be as follows.
"Annually, the average American consumes the same amount of soybeans as the average Canadian."
"The average annual per capital consumption of soybeans is the same in the US and Canada."
The second option would be appropriate if you were writing for a technical audience (e.g. for a government publication on the state of the economy). The first might be better if you were writing for the general public (e.g. for a newspaper article reporting on the above publication).