The Belle data was provided by Roman Mizuk and updated by Kirill Chilikin.
The figure shows states as observed by Belle as a function of year of observation.
On putting the mouse on the state a box will appear with information on PDG mass, JPC, and arXiv number of the discovery paper. On clicking on the state additional information will appear below the figure: PDG mass with errors, width, JPC, direct links to the discovery paper(s) and some comments about how this state change with subsequent observations.