Just looking at the data for May 2022. The first view is that the IHE specifications are of global interest. This is dominated by the USA, but is quickly followed by Germany, Italy, France, India, Netherlands, Austria, China, Canada, and Switzerland. From the picture, there is interest almost everywhere. Actually, I wonder why not everywhere?
The next perspective is to just growth over time. So over the month of May the number of users (as defined by google analytics, don’t ask me to explain that) is growing. Fun part of this diagram is the purple line that shows that the readership does indeed, mostly, take the weekends off.