According to the Central Bureau of Statistics (CBS), as of December 2011, 41,700 inhabitants lived in Tiberias. According to CBS, as of December 2010 the city was rated 5 out of 10 on the socio-economic scale. The average monthly salary of an employee for the year 2009 was 4,845 NIS. Today almost all of the population is Jewish, though prior to April 1948 Tiberias had a large Palestinian Arab population that either fled in the wake of the massacre at the Palestinian village of Deir Yassin, or was eventually expelled under British military supervision following an offensive by the Haganah. Among today's population of Jews, many are Mizrahi and Sephardic.