This is a year old now but still relevent but expected:

This is more surprising, Digital Ad Rev is stagnant for over 10 years, an could also be falling now in 2017.

Digital display advertising has become so ubiquitous that its value keeps dropping. Print advertising still pays the bills, but for how much longer? The Internet has shifted the balance of power from publishers to advertisers, who can reach their customers far more efficiently than they could by taking a shot in the dark on expensive print ads. The result, according to the Newspaper Association of America (as reported by the Pew Research Center), is that print ad revenues have fallen from $44.9 billion in 2003 to just $16.4 billion in 2014, while digital ad revenues—$3.5 billion in 2014—have barely budged since 2006.