Tableau's presentation is a bit complex. Here is the summarized version on an Excel chart, showing the total marginal tax rates on a logarithmic scale. Unfortunately, Excel does not allow this on a more granular level:
It's also unfortunate that the Ontario Health Premium is structured the way it is, with 6% and 25% marginal spikes occurring over a short scale before flattening out. Surely a better way could have been formulated! I also take issue with the Ontario Tax Reduction and Surtax: it would be very easy to integrate them into the personal amount and the various tax brackets. That, however, would add visibility to the present structure, and that is something the present crowd at Queen's Park has tried very hard to avoid.