YoY (Year over year growth) by month

[#1]

I'm trying to accomplish calculating and visualizing YoY growth. I can get the growth from the previous year to the max year (eg 2013 -> 2014, bottom graph) with this:

=((sum({$<Year = {$(=max(Year))}>}Sales) - sum({$<Year ={$(=max(Year)-1)}>}Sales))/ sum({$<Year = {$(=max(Year)-1)}>}Sales)) * 100

...but what would be the function to get it for all the years in the past (here: 2011 -> 2012 & 2012 -> 2013)? 

[#2]

Thanks so much Sunny for looking into this! Your answer works, but I marked Settu's answer as the solution since it is so compact (less code).

[#3]

Thanks Settu!

Only now that Sunny put his solution did I notice that your solution did it. I previously forgot to put the Year into dimensions.

[isingh30]

Hello Settu,

What -1 is doing?

Thank you!