How many tokamaks are there in the world?

I'm curious to know, how many tokamaks have been constructed globally to date? Is there a specific count or are there various types and stages of development that would need to be factored in to arrive at an accurate number? Additionally, are there any notable tokamaks that stand out in terms of their size, capabilities, or research significance? I'm eager to learn more about this fascinating area of technology and its global presence.