There are several possibilities. If you take a look at the graphs we have provided, you can see that in the case of the same test, over the years there have been ups and downs, sometimes significant, which are attributable not to the test itself, but rather to the characteristics of the population being assessed. Those characteristics change. Recently, for example, the introduction of a national area of selection may have had an influence. There is more diversity in the population that is applying. That might have had an influence too.
With respect specifically to the written expression test, the test we started in October 2007, even though it reflects the same standards as its predecessor, it is a different test in that more emphasis is placed on written language in a particular context. It is a test that also takes the work context into greater account. I think it is a test that gives a more complete evaluation, based on the standards, and this could be one explanation. But of course we are waiting for the results of the study.