Unchanged: Bing continued to maintain at 15.3% share of search engine market in America while Google was also at a steady level with 66.4% share in March 2012

The latest comScore's data for search engine market is now available via businessinsider.com.  Bing’s share was unchanged from February to March 2012, at 15.3% share. 

Yahoo dropped slightly to 13.7% share in March, compared to 13.8% share in February (or a drop of 0.1% share).

The Search Alliance combo captured a total of 29.0% share in March, compared to 29.1% share in February.

Google also hold 66.4% share for the past two months in a row.