The graph below shows the evolution of stressed assets, including Non-Performing Assets (NPAs) of the banking system in India. It is beneficial to look at stressed assets as whole rather than NPAs only, to avoid errors in inter-temporal comparison because an account becomes an NPA only when it is recognized as such.
As I had clarified in a speech in August 2016 on the topic Asset Quality of Indian Banks: Way Forward (rbi.org.in/scripts/BS_SpeechesView.aspx? Id=1023), this growth in stressed assets was in turn the outcome of rapid credit growth during 2006–2011. During this time, the nominal credit growth was in excess of 20% Y-O-Y and far in excess of the nominal growth in industry.