The wage increases that occurred in 2010 in Algeria allowed to increase the net monthly salary outside agriculture and Administration of 7.4% compared to 2009, the results of a survey conducted by the National Statistics Office on wages from businesses revealed. Overall, the evolution of net monthly salary was 7.4% in 2010. This is a development to link with wage increases occurred during this year, including the increase of the national guaranteed minimum wage (SNMG), which increased from DZD 12,000 to 15,000, the office said. By qualification, this increase is larger (8.6%) for supervisors than for executives (6.3%) and other staff (7.3%), a recent paper on the results a national survey on wages in businesses in 2010, indicated. The wage trends by sector are more important for transport and communications (14.4%), health (8.8%) and finance (8.4%), revealed the survey, carried out by mail among 934 companies, including 616 public and 318 private national 20 or more employees. In contrast, the evolution shows a small increase in wages in firms of collective social and personal services and those of production and distribution of electricity and gas, respectively, with variations of 1.1% and 1.8%. The average net monthly wage stood at DZD 27,000. It is DZD 38 500 in the public sector and DZD 21,500 in the private one, the national survey, which covered all activities except agriculture and Administration, reported. The same source says that workers in extractive industries (oil production and services, mining and quarrying) wages are \"very high\", DZD 72 000, as well as those of financial activities (banking and insurance) (DZD 39,500). Furthermore, wage levels are relatively low readings in the sectors of construction (DZD 20,450) and real estate-business services (DZD 23 200). Moreover, the wage disparity is less seen between the different qualifications within the same industry, says the survey, noting that it is more when we compare one sector to another. Indeed, salary of executive in sectors related to oil, health and finances, where the staff is highly qualified, are respectively DZD 90 100, DZD 49,900 and DZD 48,000. The salaries of these two sectors are 2.7 and 1.5 times higher than SNMG.