In 2007, 63 per cent of attacks were successful; in 2008, 34 per cent were successful; in 2009, 21 per cent were successful; and the figure for 2010 is likely to be below 20 per cent.
En 2007, 63 % des attaques avaient abouti; en 2008, elles n &apos; étaient plus que 34 %, pour passer à 21 % en 2009. En 2010, le taux de réussite sera probablement inférieur à 20 %2.