In agricultural tractors for example, as a general rule 40 to 50 percent of the value of the machine will be lost in the first quarter of the machine's life and by the halfway point of lifetime, from 70 to 75 percent of the value will be lost.
People with PTSD may feel constantly alert after the traumatic event. This is known as increased emotional arousal, and it can cause difficulty sleeping, outbursts of anger or irritability, and difficulty concentrating. They may find that they are constantly on guard and on the lookout for signs of danger.
Referred to as shell shock and battle fatigue in the past, PTSD can be caused by war, kidnapping, serious car or train accidents, natural disasters, violence, abuse, and torture. PTSD can be triggered by an event that happens directly to or is witnessed by an individual and can occur at any age.