How would you describe the relationships between years for Advertising as a % of net sales? Not looking for calculations, looking for an interpretation of how the company is doing based on these figures and what might be causing it to be so stable or unstable. Don't worry about the calculations. Just an interpretation please.

	Advertising as a % of Net Sales
	2013	2012	2011
Advertising Expense	605	523	513
Net Sales	$ 22,628	$17,202	$ 14,608
	2.64%	3.13%	3.61%