If you look at this chart compared to the previous day, there is no obvious change, but I have made some tweaks that would mean a screen-reader could pass on some more info to someone who comes along to this page who may need to use one. I need to do some more work on this though. I have appended a title to the wrapper like so:
wrapper
.attr("role", "figure")
.attr("tabindex", "0")
.append("title")
.text("Bar chart that shows the ranked order of NDIS participants with SDA supports")
This title can be read by a screen reader, but there is something in my formatting in another area that's making the values be understood as really high numbers - more work to do here!