The study concluded that the mortality rate per 1,000 population per year in the pre-invasion period was 5.5 (range of 4.3-7.1, using a 95% CI, confidence interval) and in the post-invasion period was 13.3 (95% CI, 10.9-16.1). Excess mortality rate over the pre-invasion period was therefore 7.8 per 1,000 population per year, with violent death accounting for 92% of the increased mortality rate.