Bank of America Merrill Lynch provides an informative chart with perspective on how bad it is in Greece,

The Greek recession has been the most severe in the recent history of crisis and compares only to the U.S. Great Depression.  Reasons include: the fear of the Euro exit; the credit crunch;  aggressive and horizontal austerity;  substantial reform delays;  political risks; the pre-crisis structure of the economy; and the strong Euro. 

Godspeed,  Greece.

(click here if chart is not observable)