Station Classifications are not done every year, it is done after every 5 years. Last time it was done on the basis of A1,A,B, etc in 2012 (7years ago). Then classification was again supposed to be done in 2017 but due to change in the system of classification from A1,A,B, etc to Nsg1,2,3, etc, the classifcation procedure was delayed and was finally done in 2018. So the classification that u are showing belongs to 2012 (7years old)