Definition: Generate a correct and concise answer for the question based on the words in the context.
Input: Context : The Dragunov sniper rifle (formal Russian: 1963 Snayperskaya Vintovka sistem'y Dragunova obraz'tsa 1963 goda (SVD-63), officially ''Sniper Rifle, System of Dragunov, Model of the Year 1963'') is a semi-automatic sniper/designated marksman rifle chambered in 7.6254mmR and developed in the Soviet Union.
Question : What was the year Dragunov sniper rifle entered service?
Output:
1963