Sadly the chart is not that useful, largely because it ignores key characteristics of radiation. For example, the first few listings on the left feature....bananas. Yeah, when you see bananas in the mix, and the old “sleeping next to someone” stuff, you know you are in poor quality information territory.
The chart ignores the type of radiation - different isotopes have different radioactive properties. If you can put bananas on the same chart as Fukushima and xrays - why don’t our nuclear power plants and medical labs use bananas for fuel instead of uranium and cesium? Why do you have to have certification and legal permits and lead lined enclosures to move a small amount of cesium on our freeways (DOT regulations) but the DOT is strangely silent about the unshielded truckloads of bananas traversing our nation?
There’s no comparison - the type of isotope makes all the difference and the chart ignores the fact that these are apple to orange (er...banana) comparisons.