[started-working-on] Yearwise distribution without any extra code.

I am doing this using a parameter to the function that is going to collect
all the data. This parameter is cleverly integrated so that it forms the condition
in case the parameter is passed and is left empty if the parameter is not passed.
Redirect directly from the auth controller to the specificYear function.
Added the links for the links on the summary page (1965, 1975, 1990)
[feature] Whichever year is being viewed will be highlighted.

This year will be given the CSS class selected. In case the CSS changes afterwards,
editing this class would be enough.