I like the idea behind the site, but I have some nits.
First, when you list something like a financial figure, you must also include the relevant time period. E.g. you say 16.0B in taxes collected by Canada from American exporters. But you don't list the time period.
Second, you say 313 are taxed today. What is this in reference to? Goods? People? Companies? Percentage?
The labels need some serious love.