Google's share of the search market dropped slightly in June, as Yahoo and Microsoft saw small increases thanks to their reliance on contextual search, according to Tuesday data from comScore.

Google's share of the search market dropped slightly in June, as Yahoo and Microsoft saw small increases thanks to their reliance on contextual search, according to Tuesday data from comScore.

Google Sites had about 62.6 percent of the market, down 1.1 percent from 63.7 percent in May. Yahoo and Microsoft's Bing both jumped 0.6 percent, to 18.9 percent and 12.7 percent, respectively.

Rounding out the top five were the Ask Network, which stayed flat at 3.6 percent, and AOL, which was down 0.1 percent to 2.2 percent.

"Both Yahoo Sites and Microsoft Sites have experienced gains due in part to the continued utilization of contextual search approaches that tie content and related search results together," comScore said in a statement.

Americans conducted 16.4 billion core searches in June, up 3 percent from May. Google had 10.3 billion of those searches, a 1 percent increase, followed by Yahoo with 3.1 billion, and Microsoft with 2.1 billion, a jump of 7 percent and 8 percent, respectively.

Ask had 584 million searches, up 1 percent, while AOL increased 2 percent to 368 million.

In terms of expanded search, which includes searches for maps, local directories, and user-generated video sites, Google Sites had 14.6 billion searches overall. Almost 11 billion of those were for Google.com, while about 3.7 billion were for YouTube.

Microsoft's Bing had about 2.2 billion searches, up 5 percent from last month. Facebook had 621 million searches, up 2 percent, while MySpace had 292 million, down 5 percent.