These numbers were posted here by DALM88FO about a month ago:
Age 60 retirements:
2006 - 6
2007 - 30
2008 - 60
2009 - 71
2010 - 91
2011 - 132
2012 - 159
2013 - 221
2014 - 268
2015 - 336
2016 - 476
2017 - 559
2018 - 527
2019 - 522
2020 - 458
2021 - 397
2022 - 297
2023 - 278
2024 - 258
2025 - 281
2026 - 233
2027 - 157
2028 - 70