I'd be inclined to draw just one set of year labeling using just the tens digits for the year and provide a key for the century line colors. If the users really need the precise data it should be provided in an accompanying table - the graph really just shows the trends.

DWIM is Perl's answer to Gödel

In reply to Re^3: Multiple data sets on one gd::graph by GrandFather
in thread Multiple data sets on one gd::graph by badpearl

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