FWIW, here are my highest reputation nodes of the year (2002-2015) (update: 2nd rep is as at 1-1-2018, as are entries for 2016 and 2017; 3rd rep is as at 15-05-2021):

• 2004 (337, 344, 349): Saturn
• 2005 (228, 230, 232): The Lighter Side of Perl Culture (Part IV): Golf
• 2006 (193, 198, 200): On Interfaces and APIs
• 2002 (179, 180, 182): Somersaulting camel
• 2007 (151, 154, 155): Dueling Flamingos: The Story of the Fonality Christmas Golf Challenge
• 2008 (146, 147, 147): Unix shell versus Perl
• 2009 (127, 128, 134): On Coding Standards and Code Reviews
• 2014  (90,  97, 100): The First Ten Perl Monks
• 2010  (87,  88,  90): Nobody Expects the Agile Imposition (Part I): Meta Process
• 2011  (86,  87,  88): Common Software Development Mistakes
• 2012  (77,  77,  78): The History of Acme::Bleach and Acme::EyeDrops
• 2015  (55,  58,  61): The Boy Scout Rule
• 2003  (56,  56,  56): Turning a script into a module
• 2017  (     54,  54): High Performance Game of Life
• 2013  (50,  53,  53): Re: Old Monks go gentle into that good night.
• 2018  (          46): Re: Splitting program into modules
• 2016  (     45,  45): Re^2: Do subroutine variables get destroyed? (Deterministic Destructor References)
• 2019  (          45): Re: Criteria for when to use a cpan module (Buy vs Build)
• 2021  (          40): Re: Perl Contempt in My Workplace
• 2020  (          31): Re^3: looping efficiency (Benchmark Example)

Though I have 26 centurion nodes, I've been unable to break the 100 barrier since 19-Feb-2009 (though The First Ten Perl Monks has a chance to get there eventually ... update: and did get there on Nov 20 2019).

I speculate without proof that we lost quite a few users (e.g. brian d foy) after the "hacked catastrophe of 2009".

See also: Perl Monks in numbers?