Even so, given the rapid expansion of the industry, the number of fatalities has been low.
However, on those roads with speed cameras, the number of fatalities remained at 12 in each year.
BBC: NEWS | UK | Wales | North East Wales | Speed camera fines show 70% rise
Pentagon officials said they expected the number of fatalities there to be somewhere between 100 and 200.
Later reports said that 120 people had died, but the number of fatalities was then lowered to at least 112.
BBC: Dhaka Bangladesh clothes factory fire kills more than 100
The number of fatalities has risen from seven to 11 with the executive particularly worried about the age of those being killed.
On Tuesday, Metro spokeswoman Candace Smith said two men and seven women had died, confirming early reports of the number of fatalities.
Nitrous oxide has also been linked to a small number of fatalities.
"The fact that the plane landed on a soft surface and that there was no fire helped keep the number of fatalities low, " he said.
But since 2004, the figures show a gradual decline in the number of fatalities, which would suggest that the roads are becoming a safer place for those on two wheels.
They were collected primarily through police reports in 2007, death certificates and the number of fatalities registered by the Not-in-Traffic Surveillance system, a virtual data collector of details regarding nontraffic crashes nationwide.
Chicago Police Superintendent Garry McCarthy has said 500 people were killed in 2012, but whatever the precise number of fatalities, honesty from the media is needed for the best solutions to be found.
Police named two more of the dead on Monday morning and said they now expected the final number of fatalities to be closer to 30 than 40 - far fewer than had been feared.
While the population has increased 10 fold since 1906, when less than a million people called the greater San Francisco Bay area home, the number of fatalities does not increase proportionally in the recent estimates.
Still, the number of fatalities is dropping, even though vehicle traffic is rapidly increasing: the number of miles driven in New Mexico each year has increased from 16.5 billion in 1990 to 21.5 billion in 1996.
Forbes.com asked four oncologists what an acceptable number of fatalities would be, in order to make it easier to judge the safety results when they are presented at the annual meeting of the American Society of Clinical Oncology in May.
Mr. MICHAEL O'HANLON (Brookings Institution): Well, you give a very good statistic, that women are about 10 percent of the force, so maybe two to three percent of the number of fatalities, with 71 having given their lives in this mission, and so that gives you some rough sense right there of the relative danger of the jobs they are doing.
Estimates for the number who died vary widely, but in many of the areas surveyed, the number of child fatalities from malaria more than doubled.
The annual Aintree event had been under intense scrutiny from animals rights groups after recent editions of the race had been marred by a high number of equine fatalities -- 11 since 2002.
The number of alcohol-related highway fatalities, meanwhile, dropped from 20, 000 in 1980 to 9, 878 in 2011, the NTSB said.
Meanwhile, the number of U.S. troop fatalities in March reached 38, a higher figure than in February but continuing the general decline in American troop deaths through the last six months.
The region had the highest number of accidents -- 35 -- but no fatalities.
Sabatini defended the FAA's record before Congress, noting that the agency is working toward a long-term rate of four fatalities for every 100 million passengers, an incredibly low number.
But safety campaigns kicked off in 2001 sharply dropped the number of lightning deaths each year, so that 30-year average consistently overestimates fatalities because it includes data from before the recent decline, Roeder said.
应用推荐