Data by day viewed by Month

Hello,

My data set is very simple, it has 2 columns, one for Date and the other for Value.  The dates range from January 2011 through current day(by day).  I need to display a line chart where the legend is years, thus showing 7 lines(one for each year) and viewed by month.  However, i do not want to aggregate by month but rather show the unique daily values in the month view.  Please help.

Thanks