According to  the Interactive Advertising Bureau, Internet advertising revenue surged past $20 billion for an all time record in the first half of this year.

Leading the way was an “explosion in mobile ads shown by companies including Facebook and Google”.

Online ad revenue of $20.1 billion in the first half represents an increase of 18% over last year’s first-half ad revenues of $17 billion.

Mobile ad revenue soared 145% to $3 billion in the first half of 2013 representing triple-digit growth at 145 percent, from $1.2 billion in the same period last year

• Digital video, a component of display-related advertising, took in $1.3 billion in revenue during the first six months of 2013, an uptick of 24% over the first half of 2012 at $1.1 billion
• Search revenues in the first half of 2013 totaled $8.7 billion, up 7% from $8.1 billion in the first half of 2012
• Display-related advertising revenues in the first half of 2013 totaled $6.1 billion, accounting for 30 percent of revenues in the time period, up 9 percent from $5.6 billion in the first half of 2012
• The top three advertising verticals accounted for 46 percent of advertising revenue, including Retail at 20 percent, Financial Services at 14 percent and Automotive at 12 percent

Check out this crazy chart of how Internet Advertising has grown since 1996.  As a point of reference I registered my first domain in 1997.

The IAB began measurements in 1996; dollar figures are rounded and obviously a lot of zeros are left off:

 

Year	Revenue	% Growth
HY 2013	$20,066	18%
HY 2012	$17,028	14%
HY 2011	$14,941	23%
HY 2010	$12,127	11%
HY 2009	$10,900	-5%
HY 2008	$11,510	15%
HY 2007	$9,993	26%
HY 2006	$7,909	37%
HY 2005	$5,787	26%
HY 2004	$4,599	40%
HY 2003	$3,292	11%
HY 2002	$2,978	-20%
HY 2001	$3,720	-7%
HY 2000	$4,013	147%
HY 1999	$1,627	110%
HY 1998	$774	125%
HY 1997	$344	320%
HY 1996	$82