SQL Date Query

Hi All i have the following query which all works fine

SELECT     TOP (100) PERCENT CAST(DATENAME(Month, Month) AS varchar) + ' ' + CAST(YEAR(Month) AS varchar) AS Month, COUNT(Sales_Order) AS Total_Ord, 
                      COUNT(Passed_Delivery) AS Passed, 100 * (COUNT(Passed_Delivery) / CAST(COUNT(Sales_Order) AS float)) AS Percentage, Month_No, Year_No
FROM         dbo.SC21_Customers
GROUP BY CAST(DATENAME(Month, Month) AS varchar) + ' ' + CAST(YEAR(Month) AS varchar), Month_No, Year_No

Select allOpen in new window

however aswell as keeping all of the previous dates and years etc, i now need it to include 2013 data, can anybody help to ammend it.

John