WASHINGTON — Democratic vice presidential candidate Joe Biden and his wife gave an average of $369 a year to charity during the past decade, his tax records show.

Democratic presidential nominee Barack Obama's campaign today released 10 years' worth of tax returns for Biden, a senator from Delaware, and his wife Jill, a community college instructor. The Bidens reported earning $319,853 last year, including $71,000 in royalties for his memoir, Promises to Keep: On Life and Politics.

The Bidens reported giving $995 in charitable donations last year — about 0.3% of their income and the highest amount in the past decade. The low was $120 in 1999, about 0.1% of yearly income.

Over the decade, the Bidens reported a total of $3,690 in charitable donations, or 0.2% of their income.

Biden gave average of $369 to charity a year