Recent growth at Giving What We Can and GiveWell

Summary: For the last three years Giving What We Can's number of additional members each year has been fairly steady. The same was true of GiveWell's increases in number of donors and money moved (excluding Good Ventures) for 2010-2012. However, small donors to GiveWell have shown accelerated growth in 2013 following Peter Singer's TED talk, which may be reflected by large donors as the figures for the 2013 giving season become known.