This is relatively easy to do with GWWC:
https://www.givingwhatwecan.org/dashboard
Eyeballing the dashboard, GWWC has 50-60 members/month outside the pledge drives in 2015 and 2016, or about 11-14 members/week, and about 30ish/month in 2014, or about 7/week.
This is relatively easy to do with GWWC:
https://www.givingwhatwecan.org/dashboard
Eyeballing the dashboard, GWWC has 50-60 members/month outside the pledge drives in 2015 and 2016, or about 11-14 members/week, and about 30ish/month in 2014, or about 7/week.