UPDATE: These numbers are apparently wrong.
From the Kuwait News Agency via Drudge:
BAGHDAD, March 14 (KUNA) — The rate of killings of US troops in Iraq has been on the decline, down by 60 percent, since the launch of the new security measures in Baghdad, according to statistics revealed by the Multi-National Force -Iraq Combined Press Information Centre.
Only 17 members of the US military in Iraq have been killed since February 14 till March 13, compared to 42 from January 13 to February 13; the rate was on the decline during the first month of the security crackdown, compared to a month before.
Two of the 17 soldiers died at US Baghdad camps of non-combat causes.
The remarkable decrease in killings among the US troops came at a time when more of these troops were deployed in the Iraqi capital, especially in districts previously regarded as extremely hazardous for them such as Al-Sadr City, Al-Azamiyah, and Al-Doura.
Meanwhile, US attacks on insurgent strongholds north of Baghdad curbed attacks against helicopters. Before the new security plan, many such craft were downed leaving 20 soldiers dead.