WASHINGTON (AP) — President Barack Obama and first lady Michelle Obama reported assets worth between $1.8 million and $7 million for last year, little changed from their previous year's holdings, according to financial disclosure forms released Thursday. 
 
 The forms, required by law, permit public officials to list their assets in broad ranges. As a result, a precise net worth is difficult to ascertain. 
 
 The forms show the largest jointly owned assets by the president and the first lady were Treasury notes worth between $1 million and $5 million. While the value of their assets is certainly higher than that of most Americans, their mix reflects the financial demands of a 50-something couple with two daughters. Their assets include Vanguard retirement funds and college savings plans. 
 
 Royalties in 2013 from Obama's books, "Dreams From My Father," ''The Audacity of Hope" and "Of Thee I Sing," totaled between $70,000 and $165,000. In 2011, they totaled between $250,000 and $2.1 million. 
 
 The Obamas also have a 30-year mortgage on their Chicago home worth between $500,000 and $1 million with an interest rate of 5.625 percent. 
 
 Vice President Joe Biden reported 2013 assets of between $276,000 and $940,000, including a rental property owned jointly with his wife, Jill, in Wilmington, Delaware. 
 
 Unlike the Obamas, Biden has taken advantage of lower mortgage rates and refinanced his mortgage last year. He listed a 30-year mortgage on his principal residence and his rental property worth between $500,000 and $1 million with an interest rate of 3.375 percent. 
 
 Biden also reported making $25,000 donations to each of two Pennsylvania anti-domestic violence groups. The $50,000 came from an award Biden received from the Pennsylvania Society, which honored Biden last year with its gold medal for distinguished achievement, 
 
 Last month, the Obamas released their 2013 tax returns and reported paying $98,169 in taxes on $481,098 in adjusted income. 
 
 The Bidens reported paying $96,378 in federal taxes last year on adjusted gross income of $407,009. ||||| Advertisement Continue reading the main story 
 
 The assets of President Obama and his wife, Michelle, were valued as high as $7 million last year, according to a financial disclosure form released by the White House on Thursday. 
 
 Most of the president’s income came from royalties on his three books and investments made possible by the proceeds. His memoir, “Dreams From My Father,” published in 1995, continued to make the most money for Mr. Obama, generating between $50,001 and $100,000 in royalties, according to the disclosure form. “The Audacity of Hope,” from 2006, earned between $15,001 and $50,000, and “Of Thee I Sing: A Letter to My Daughters,” released in 2010, earned between $5,001 and $15,000. 
 
 Sales from Mr. Obama’s books have decreased steadily every year since he took office as president, according to the disclosure forms the White House has released. 
 
 Treasury notes held jointly by the president and Mrs. Obama are their most valuable assets, worth between $1 million and $5 million. The forms only require the Obamas to list their assets and income in wide ranges, leaving it difficult to discern the exact amount of the couple’s worth in 2013. 
 
 Vice President Joseph R. Biden Jr.’s publishing career earned him considerably less than the president’s totals. “Promises to Keep,” released in 2007, earned less than $201 in royalties last year, according to Mr. Biden’s financial disclosure form, also released on Thursday. 
 
 The Obamas’ 2013 tax returns, released in April, showed they paid $98,169 in federal taxes on $481,098 in adjusted gross income. The Bidens paid $96,378 in taxes on an adjusted gross income of $407,009. 
 
 The Obama administration was the first to publish financial disclosure reports online. High-ranking government officials have been have been required to release their financial information since passage of the Ethics in Government Act of 1978. 
 
 “Neither the president nor the vice president have any conflicts of interest, and their reports have been reviewed and certified by the independent Office of Government Ethics,” Jay Carney, the White House press secretary, said in a statement. “We are continuing this administration’s practice of posting these forms online here in the interests of transparency.”
– Barack Obama may not be Mitt-Romney-rich (or even Al-Gore-rich), but he's doing all right for himself. The president's latest financial disclosure forms, released yesterday, reveal that he and Michelle had total assets worth somewhere between $1.8 million and $7 million in 2013, the AP reports. (That's just like 2012.) Most of that is in US Treasury notes, which are worth between $1 million and $5 million. Other assets include Vanguard retirement funds and college saving funds. Current financial disclosure rules only require politicians to list their assets within a broad range, so it's hard to pin down exactly how much Obama has, the New York Times explains. Besides his presidential salary, Obama makes most of his money off royalties from his books, though the market seems to believe he peaked as a writer in the '90s. His latest, 2010's Of Thee I Sing, A Letter to My Daughters, earned between $5,001 and $15,000, compared to $50,001-$100,000 for 1995's Dreams From My Father. But even Of Thee's numbers probably sound good to Joe Biden, who made less than $201 in royalties last year off of his 2007 book Promises to Keep.