How would you describe the relationships between years for the Op Ex Growth? 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.

Operating Expense Growth
	2013	2012	2011
Operating Ex	$ 4,025	$3,327	$ 3,036
Nominal Growth Rate	2012-2013		21.0%
	2011-2012		9.6%