Media agency ZenithOptimedia forecasts that global advertising spending will return to the kind of growth rates seen before the financial crisis.

ZenithOptimedia sees spending growing 5.5% to $537 billion in 2014 and 6.1% in 2016. Spending grew just 3.9% in 2013, according to the agency.

Television is the dominant media, representing 40% of global ad spending, compared to 21% for the internet. ZenithOptimedia forecasts that TV spending will grow 5.2% globally in 2014.

Ad spending increases in North America will be smaller than the worldwide growth rate. ZenithOptimedia expects 4.8% growth in 2014, a 4.6% gain in 2015 and 4.3% growth in 2016.

ZenithOptimedia says the Internet is the fastest growing media and that its growth will bolstered by the spread of programmatic buying. The agency sees spending on online advertising growing 16% annually from 2014 to 2016, with display advertising growing at a 21% a year through 2016.

Mobile internet advertising is growing six time faster than desktop internet, according to ZenithOptimedia. With the rapid adoption of smartphones and tables, mobile advertising is expected to grow 50% a year from $13.4 billion in 2013 to $45 billion in 2016. Desktop internet advertising is expected to grow just 8% a year.

Read more at B&Chere.