Chart - Q3 Internet Advertising Revenues, 2001-2012

Online ad revenues continue to climb at double-digit rates, growing 18% year-over-year in Q3 from $7.82 billion to $9.26 billion, according to the latest quarterly revenue report from the Internet Advertising Bureau and PricewaterhouseCoopers. That makes Q3 the largest quarter on record, up from the previous peak of $8.97 billion set in the fourth quarter of 2011.

That’s significant because the fourth quarter is typically the largest advertising quarter of the year. If advertising revenues continue to hold form, the fourth quarter of this year will set yet another record, likely breaking the $10 billion mark. That would be a significant bump from $1.64 billion in Q4 2001. An analysis of full-year revenues by MarketingCharts shows that when adjusting for inflation and online population growth, though, the rise has been healthy, but not as dramatic. Read the rest at MarketingCharts.