NEW YORKGoogle accounted for 67.25 percent of all U.S. searches in the four weeks ending March 29, according to Internet traffic analyst Hitwise.

Hitwise said Google was followed by Yahoo! (20.29 percent of U.S. searches), MSN (5.25 percent) and Ask.com (4.09 percent). The remaining 46 search engines included in Hitwise's analysis accounted for a total of 1.72 percent of U.S. searches.

Comparing March 2008 to March 2007, Hitwise said the travel, entertainment, business, finance and sports categories had double-digit increases in their shares of search-engine traffic.

Google was at 64 percent in March 2007, with MSN trailing at 9 percent.