You may have noticed that the number of searches reported in your weekly search report has gone down, perhaps dramatically. We have recently changed the reporting system to ignore searches from known robots.
Robots have long dominated overall web traffic. As a result of their increased sophistication, we've seen an increase in the number of searches carried out by robots. These robot searches skew the search data, making it harder to see just what your (human) visitors are searching for. On your search report the data no longer includes searches from known robots (and you will see the number of robot search that were ignored).