Bing is catching up to Google according to one market research firm.

According to Experian Hitwise, Microsoft's Bing search engine has captured 30 percent of the market. Google is still in first place with 64.42 percent of all U.S. searches using the popular search engine in the month of March. However, that number was actually down five percent from the previous month, showing Google's pull is on the decline.

Bing's monthly increase of five percent was matched by Yahoo!, which also increased by five percent. Yahoo!'s search went from 14.99 percent of all searches in February to 15.69 percent in March.

Experian has also found more people are using longer search quieries less. Long searches, which are five to eight words, are down three percent from February 2011 to March 2011. Shorter queries, one to four words, are up one percent.

Experian Hitwise uses a large sample size, five million worldwide, including 10 million in the United States, to calculate their numbers.  The table is below.

Experian

Experian Search