If you are wondering how google make $37 billion last year and who bought the most google Adwords, then this infographic is for you.

InfoGraphic: What Industries Contributed the Most to Google's Earnings in 2011?

Despite the recent recession, Finance and insurance industries topped the list and spent 4 billion dollar which was more than 10% of google revenue.

Top spenders are Lowe's ( $59M), amazon.com ($55M) and home depot ($50M). Lowe's and hoe depot's whopping spending on google Adword surprised me.  It explains the connection between the Internet and physical world. We are going online to research and search and buying either online or in store.

One of the highest cost per click keyword is "self employed health insurance" which was auctioned at $43.39. Some of the companies have been spending well over 100k a day just on adword keywords.

WordStream compiled these revenue estimates by using it's own trillion-keyword database and the Google Keyword Tool to determine the top 10 million most popular search queries in 2011, as well as their average cost-per-click prices as paid by advertisers.  WordStream used it's own PPC technologies to categorize the huge keyword list by industry, such as “Finance & Insurance,” then applied a model that weighed the relative percentages of each industry’s revenue (keyword volume * average cost per click) to Google’s 2011 revenues, excluding non-advertising revenues.

For further reading - http://www.wordstream.com/blog/ws/2012/01/23/google-revenues