Why does it say n/a as reply?

Short answer:  Over four times as many Americans die every year from a lack of sufficient health care as have died in all terrorist attacks, at home and abroad. 

According to a 2002 study by the "Institute of Medicine", a "non-profit organization of experts that advises Congress on health issues", over 18,000 people per year die in the US because of, basically, a lack of health insurance.

 ( http://www.usatoday.com/news/health/healthcare/2002-05-22-insurance-deat...)

Figures posted on Senator Barack Obama's web site suggest the numbers of those without insurance have gone up by roughly 17% since then (from 40M total to 47M total wh's employers don't provide insurance, but make too much to qualify for government programs) so, presumably, the death toll has risen with it.  If the percentages are the same, the new number would be 21,519 deaths per year from lack of insurance.

Some quick research and math leads me to a total number of US citizens killed by terrorist attacks, at home and abroad, of less than 5000.  So, even if we included all US casualties in Iraq as "insurgent" attacks, which would be wholly inappropriate, the total number would still be less than half as many Americans as die every year due to an inadequate access to health care.

I found this information on a very odd sounding site, but the info looks solid.

It is now being reported that the number of uninsured Americans has reached an all time high.

According to US Census Bureau data released yesterday, the number of Americans living without health insurance last year jumped to 47 million with the number of uninsured children also increasing.

The census data found that the number of uninsured Americans rose by 5% from 2005, and was widely due to cutbacks in employer-sponsored health coverage.

In 2004 an estimated 7.7 American children were living without health insurance, and in 2005, that number rose to 8.7 million children living without health insurance.

"For many years, Medicaid and SCHIP were growing at a fast enough rate to more than offset the falling numbers of people on employee-sponsored healthcare, but not in the last two years," said Leighton Ku, a senior fellow at the Center on Budget and Policy Priorities, based in Washington. "They failed to provide the same effectiveness in protecting children's health insurance..

The Bush administration is not making many friends these days, due to them earlier this month announcing plans to make it even tougher for US children to be enrolled in the Children's Health Insurance Program or SHIP.

"Today's news serves as even more evidence that programs like SCHIP must be fully funded and extended to the growing numbers of uninsured Americans," said Senator John F. Kerry of Massachusetts. "Healthcare costs are soaring, and our healthcare professionals are feeling incredible burdens."
http://www.dogflu.ca/08292007/08/uninsured_americans_rise_to_47_million

"When fascism comes to America, it will be wrapped in the flag, carrying a cross." ~ Sinclair Lewis

"I'm just pissed off that not enough other people are pissed off."~Bill Maher