Gains on sales of fixed assets during the first half of the year stood at 285 million euros, compared to 245 million euros in the first half of 2011. In 2012 this amount mainly includes the impact from the sale of non-strategic towers, principally in Spain, Brazil and Mexico, for a total amount of 211 million euros (88 million euros in the second quarter mainly in Brazil and Mexico), as well as a capital gain of 39 million euros from the sale of applications in the second quarter (including 18 million euros from the sale of applications in Telefónica España). This heading, in the first half of 2011, included the positive effects of the partial reduction of our economic exposure to Portugal Telecom and the sale of non-strategic towers.Significant improvement in efficiency levels During the first half of 2012, operating income before depreciation and amortisation (OIBDA) amounted to 10,431 million euros (-7.7% year-on-year; -6.2% in underlying terms), and recorded an improvement of 1.1 percentage points compared to the first quarter of the year (+1.2 percentage points in underlying terms), leveraging on cost initiatives and efficiencies achieved. OIBDA margin stood at 33.7% in the first half of the year (-2.9 percentage points year-on-year; -2.3 percentage points in underlying terms), showing a significant sequential improvement vs. the first quarter. Thus, OIBDA margin in the second quarter was 34.6% in underlying terms vs. 32.8% in the first quarter, registering, as well, a lower year-on-year erosion (-1.9 percentage points vs. -2.8 percentage points in the first quarter). Telefónica's geographic diversification is again reflected by the increasing contribution of Telefónica Latinoamérica to consolidated underlying OIBDA, accounting for 50% (+3.8 percentage points with respect to 2011). It is worth to highlight that Telefónica España's contribution to total OIBDA fell to 32%, and thus Telefónica Europe accounts for 50% of total OIBDA.