Iraqi attacks, mostly against Iranian shipping, rose from 40 to 65 in the same period.
American officials say that the first suspected use of the penetrator occurred in late 2003 and that attacks have risen steadily since then.
In 2007 the attacks rose by 10% to 263 attacks.
Even though he won a landslide election a few months ago, attacks against his legacy are rising.
The number of people detained since the Sept. 11 attacks rises to over 1,000.
Insurgent attacks rose in an apparent effort to divert attention from the high-profile battle west of Baghdad.
In the economically critical Straits of Malacca however, attacks rose by a third.
Iranian attacks more than tripled, to 41, from 13, and Iraqi attacks rose to 65 from 40.
Are attacks on shipping rising or falling?