Multi Years of Multis (Bronze) - RM Challenge #182 Mystery Cache

This challenge requires you to find 15 multicaches that were each placed in different years through 2021.

CuteLilFuzzyMonkey and RetiredGuy have combined to put out the Retired Monkey Challenge Trail. At least one of the two of us has qualified for each challenge. Because we have very different caching styles, it will be very tough for one person to complete all of them. Your progress will be tracked on the leaderboard. As with many good caches, our inspiration for many of these caches came from others, so thank you all!

For all of the caches in this series, we have provided a checker through Project GC to verify whether you have met the challenge. You can also go to the Verification Page to see for which of the challenges you have qualified.

Please use the above link to verify that you have fulfilled the challenge.

Here are RetiredGuy's qualifying stats:

"Find multicaches hidden in at least 15 of the 22 years ending with 2021."
2000-06-11 - GC1E Tour of Stone Mountain - (Multi-cache)
2001-07-05 - GCEF9 Grave Calculations - (Multi-cache)
2002-02-13 - GC39BB Blue Heron - (Multi-cache)
2004-11-23 - GCM5DP Veteran's Watch - (Multi-cache)
2005-08-07 - GCQ20K Swift Liberty - (Multi-cache)
2006-03-22 - GCTXP2 BR95- One-Two: The Traveling Cache - Chapter Three - (Multi-cache)
2007-02-15 - GC10XM2 Okinawa Classic Cache: MALIBU (not California) - (Multi-cache)
2008-05-22 - GC1CGNW Captain Forster's Hammock Preserve Cache - (Multi-cache)
2009-12-25 - GC22964 SESAME STREET - (Multi-cache)
2010-02-15 - GC23ZTB Operation BlackBerry - (Multi-cache)
2011-01-16 - GC2ENT2 The Bucket List #17 - (Multi-cache)
2012-07-31 - GC3RAHG The Apple of My Eye - (Multi-cache)
2013-05-27 - GC4D2D5 GEORGE - (Multi-cache)
2014-09-29 - GC5DWQM Raise the Sail! - (Multi-cache)
2015-01-28 - GC5KZAF The Final Voyage of Janice Applegate - (Multi-cache)
2016-03-21 - GC6DX99 Kirstenhofs Meadows - (Multi-cache)
2017-02-21 - GC70WWJ BCDT #13: Local Legend - (Multi-cache)
2018-08-21 - GC7WJJ6 11 Visit Conroe - Willis History - (Multi-cache)
2019-05-28 - GC88PR9 TCGT24 - Trails at Sycamore Bridge - (Multi-cache)
2021-04-17 - GC99K48 NEFR GT 08 - La Justice de Biddeford - (Multi-cache)
Qualifying 20 / 15, PASSED

You may sign the log before completing the challenge. If you do this, please use a "Write note" log to record your find and then a "Found it" log once you have completed the challenge.

This cache is part of the Retired Monkey Challenge Trail.