Some of the ARRL PPX charts

April 2021 here

November 2020 here

April 2020 here

November 2019 here

April 2013 ppx error chart here

November 2012 ppx error chart here

April 2012 ppx error chart here

April 2011 ppx error chart here

November 2010 ppx error chart here

April 2010 ppx error chart here

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