By 12.04 standards values appear almost identical to "normal" values

[Robert Ancell]

For all releses post 12.04 there are two lines for each release, one "normal" and one "by 12.04 standards". I'm assuming this is because post 12.04 the metric is better calculated using some more information that was not available in 12.04.

To me, the difference between the "normal" and "12.04 standards" lines is almost imperceptable.

Given you can't really see a difference and the exact numbers don't seem useful (more just the graph trends) I'd recommend dropping the "by 12.04 standards" lines to make the graph less confusing. Put in a footnote if the difference is worth noting.