NWA age 65 retirements from ezopenboard...based upon my birthday month for my retirement (Jan) so the numbers should be very close to total retirements...Hope this helps.
2009 9
2010 8
2011 15
2012 15
2013 22
2014 124
2015 182
2016 199
2017 210
2018 231
2019 258
2020 288
2021 287