Just to add a layer of flavor to this:
2017 had 25 commits:
60% attrition rate (from transfers alone)
2018 had 23 commits:
65% attrition rate (from transfers alone)
2019 had 18 commits:
56% attrition rate (from transfers alone)
2020 had 21 commits:
43% attrition rate (from transfers alone)...