Nielsen Online today released its rankings of U.S. search share for January. Overall search increased 27.5 percent year over year to 9.5 billion searches. Google had year over year increase of 40.8 percent and received 62.8 percent of searches. Yahoo had a year over year increase of 8.7 percent and received 16.2 percent of searches. Microsoft had a year over year increase of 18.3 percent and received 11.2 percent of searches.