In 1980, political tensions from the rule of William R. Tolbert resulted in a military coup during which Tolbert was killed, marking the end of Americo-Liberian rule in the country and beginning over two decades of political instability. Five years of military rule by the People's Redemption Council and five years of civilian rule by the National Democratic Party of Liberia were followed by the First and Second Liberian Civil Wars. These resulted in the deaths of 250,000 people (about 8% of the population) and the displacement of many more, with Liberia's economy shrinking by 90%. A peace agreement in 2003 led to democratic elections in 2005, in which Ellen Johnson Sirleaf was elected president, making history as the first female president in the continent. National infrastructure and basic social services were severely affected by the conflicts as well as by the 2013–2016 outbreak of Ebola virus, with 83% of the population living below the international poverty line as of 2015.