The cost of natural gas saved in 2006 $âs is $5,346. Payback period = $5,346 / yr$81,889 Simple Payback = 15 years However, itâs reasonable to assume that the price of natural gas would increase during the life of this system.
One hundred police officers have died nationwide so far in 2015 while in the line of duty, up 15 percent from this time last year, according to the National Law Enforcement Officers Memorial Fund, a nonprofit law enforcement information clearinghouse. Of those 100, 31 were gun-related fatalities.
At the same time the number of police officers has increased in the US. There are a quarter of a million more police officers working today than there were three decades ago. So when you consider the number of officers killed per 100,000, there has been a dramatic decrease. The annual per capita number of officers killed has dropped from 24 per 100,000 in the 10 years to 1980 to 7.3 per 100,000 in the 10 years to 2013 (the last year for which there is good data). This chimes with a bigger trend, which is a steady reduction in crime, including homicides.