Democratic presidential candidate Sen. Bernie Sanders made good Friday on his pledge to release his 2014 federal income taxes, showing earnings of just over $205,271 — and an income tax bill of $27,653.The Vermont lawmaker and his wife, Jane, made charitable contributions totaling $8,350, and earned nearly $46,000 in Social Security benefits.According to the Washington Post , the forms show most of the couple's 2014 income came from Sanders' $174,000 Senate salary, though Jane Sanders reported collecting $4,900 as a commissioner with the Texas Low Level Radioactive Waste Disposal Compact Commission.Sanders's tax returns have become a volatile issue in the race, with front-runner Hillary Clinton accusing her rival during a CNN-sponsored debate Thursday of being slow to share them with the public.Candidates aren't legally required to release their tax returns, but Clinton has released voluminous amounts of full tax returns, the Post reports."Look, I don't want to get anybody very excited," Sanders said during the Thursday debate."They are very boring tax returns. No big money from speeches, no major investments. Unfortunately — unfortunately, I remain one of the poorer members of the United States Senate. And that's what that will show."Sanders also has been critical of Clinton for not releasing transcripts of her speeches to Goldman Sachs. Clinton countered on Thursday she'd release the transcripts of speeches she gave to Goldman Sachs "when everybody does it."According to a compilation from the Weekly Standard, a speech in Tucson, Arizona, to the Goldman Sachs Group in 2013 earned the former secretary of state $225,000.Sanders' net worth was estimated to be $436,000 in 2014, according to calculations by the Center for Responsive Politics, which ranked him No. 81 on a chart listing personal wealth in the Senate, CNN reports.