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Stephen Lovekin/Getty Images Hillary Clinton attends the Step It Up For Gender Equality event celebrating the 20th anniversary of the fourth World Conference On Women in Beijing at Hammerstein Ballroom on March 10, 2015 in New York City.

Back in April of 2007, when she was campaigning for the Democratic presidential nomination for the first time, then-Senator Hillary Clinton lashed out at the secrecy of the George W. Bush administration.

She told a New Hampshire audience that if elected she would implement a "plan to enhance accountability and transparency" and "to replace secrecy and mystery with openness." One part of her plan: "It's time our government went fully online as well."

She lost her White House bid. But 20 months later, before Barack Obama took that job and she became secretary of state, she set up a private computer server registered to her home in Chappaqua, N.Y., to handle all her official, as well as private, emails for the next four years. Her decision a secret until earlier this month impeded efforts by the press and others to review State Department actions.

Today it is Hillary Clinton's record of transparency that has come under fire. At a press conference Tuesday, she acknowledged that in retrospect "it would've been better for me to use two separate phones and two email accounts." She has asked the State Department to release her official emails, a process that could take months.

Few public figures have been as scrutinized as Hillary Clinton. Sometimes her disclosures go beyond what is required, but she's also racked up a reputation for secrecy that at times has returned to haunt her.

Here are five examples covering the last two decades. Some are drawn from a 2007 book I did, with Don Van Natta Jr., entitled "Her Way: The Hopes and Ambitions of Hillary Rodham Clinton. (Little Brown & Co.) Clinton's office didn't respond to a request for comment.

1) 1992: The Commodity Trades

During Bill Clinton's first run for the White House, his campaign declined to release all of the couple's tax returns. Later it emerged that the campaign had weighed requests from the press and decided not to do so, because a few of the returns showed Hillary Clinton's spectacular success in commodities trading, in which she made almost $100,000 from an initial investment of $1,000 in a matter of months for a return of almost 10,000 percent. Hillary Clinton threatened a campaign lawyer who had access to the material with retribution if she released the data: "You'll never work in Democratic politics again," the lawyer, Loretta Lynch, says Clinton told her. It wasn't until 1994, as the New York Times prepared to publish an article detailing the trades, that the Clintons made public the returns.

2) 1993: The Health Care Task Force

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Hillary Clintons Top 5 Clashes Over Secrecy