In which year the firm has shown maximum percentage increase in its revenue with respect to the previous year ?

Percentage increase :

Year $2011 Rightarrowleft(frac{350-260}{260} ight) imes 100=frac{900}{26}=34.6 \%$

Year $2014 Rightarrowleft(frac{340-250}{250} ight) imes 100=frac{900}{25}=36 \%$