Anu Narayanswamy

Online giving is still growing, but triple-digit annual increases are a thing of the past. Internet fundraising grew by roughly 13 percent in 2013, according to a survey of 100 of the largest nonprofits conducted by The Chronicle.

The Chronicle surveyed all the organizations in its Philanthropy 400 rankings of the largest nonprofits measured by annual fundraising. Of the 100 that responded, the Leukemia & Lymphoma Society topped the list, with more than $98-million in Internet gifts in 2013.

While online giving continues to gain steam, it still accounts for a very small portion of the money charities rely on. Among the 76 nonprofits that provided both their online and overall giving totals for 2013, the median share of online gifts is just 2 percent of all donations from private sources.