Bing increased Microsoft’s share of the US search market by 1% last month and continues to slowly but steadily chip away at Yahoo and Google, according to an analysis conducted by StatCounter.

Data for the month of June reveal that Microsoft (whose search share includes Bing, Live Search and MSN Search) had 8.23% market share for the month, up from 7.21% in April, MarketingCharts reports.

Figures from early in the month show Bing temporarily overtook Yahoo as the #2 search engine, but the full-month figures put it behind Yahoo, which had 11.04% in June.

Google – which remains the undisputed search leader – had 78.48% share for the month, down from 79.07% in April.