CFCHART - limit how many x-axis labels

[bloodbanker]

I have a chart that spans many years and lists each month.

I would like to keep the graph and data points listed by month, but maybe only have the axis list the years?  The exact dates aren't important, the trend of the graph is.

Here is an example, clearly the dates are unreadable.

Can this be done?  I'm using CF9.

Thanks